Every Pro Baseball Player Charlie Has Seen: A
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
- David Aardsma (pitcher, b. 1981, Colorado)
- 2012: Trenton Thunder, Eastern League (AA) - 1 game 15-Sep
- 2013: New York Mets, Major League Baseball - 3 games 4-Jul 9-Sep 18-Sep
- Hank Aaron (outfielder, b. 1934, Alabama; d. 2021, Georgia)
- 1967: Atlanta Braves, National League (MLB) - 1 game 9-Jul
- Oginga Aaron (infielder, b. 1979, Maryland)
- Andy Abad (first base/outfield, b. 1972, Florida)
- 1995: Trenton Thunder, Eastern League (AA) - 1 game 3-Jul
- 1996: Trenton Thunder, Eastern League (AA) - 1 game 20-Jul
- 1998: Pawtucket Red Sox, International League (AAA) - 1 game 1-Aug
- 2001: Sacramento RiverCats, Pacific Coast League (AAA) - 1 game 3-Aug
- 2002: Calgary Cannons, Pacific Coast League (AAA) - 1 game 9-Aug
- Fernando Abad (pitcher, b. 1985, Dominican Republic)
- 2018: Long Island Ducks, Atlantic League (independent) - 2 games 4-Sep 23-Sep
- 2021: Baltimore Orioles, Major League Baseball - 2 games 16-Aug 19-Aug
- 2023: Nashville Sounds, International League (AAA) - 1 game 23-Sep
- Alex Abbott (outfielder, b. 1994, Georgia)
- 2014: AZL Angels, Arizona League (rookie) - 1 game 20-Jul
- Andrew Abbott (pitcher, b. 1999, Virginia)
- 2024: Cincinnati Reds, Major League Baseball - 1 game 27-Jul
- Chuck Abbott (infielder, b. 1975, Illinois)
- 1999: Erie SeaWolves, Eastern League (AA) - 1 game 10-Apr g1
- Cory Abbott (pitcher, b. 1995, California)
- 2022: Washington Nationals, Major League Baseball - 1 game 26-Sep
- 2024: Charlotte Knights, International League (AAA) - 1 game 20-Sep
- Jim Abbott (pitcher, b. 1967, Michigan)
- 1993: New York Yankees, American League (MLB) - 1 game 4-Sep
- Jim Abbott (pitcher, b. 1979, Michigan)
- 2004: New Britain Rock Cats, Eastern League (AA) - 1 game 21-Jun
- Kurt Abbott (infielder, b. 1969, Ohio)
- 1996: Florida Marlins, National League (MLB) - 2 games 9-Sep 10-Sep
- 1999: Colorado Rockies, National League (MLB) - 1 game 3-Sep
- 2000: New York Mets, Major League Baseball - 1 game 24-Sep
- 2001: Florida Marlins, Major League Baseball - 1 game 31-Jul
- Kyle Abbott (pitcher, b. 1968, Massachusetts)
- 1992: Philadelphia Phillies, National League (MLB) - 1 game 22-Aug
- Sam Abbott (first baseman, b. 1999, Washington)
- 2019: Great Falls Voyagers, Pioneer League (rookie) - 1 game 4-Jul
- Mitch Abeita (catcher, b. 1986, Texas)
- 2008: Staten Island Yankees, New York-Penn League (short-season) - 2 games 16-Jul 5-Sep
- Mick Abel (pitcher, b. 2001, Oregon)
- Nick Abel (pitcher, b. 1983, New York)
- 2006: Hagerstown Suns, South Atlantic League (Low-A) - 1 game 15-Aug
- 2009: Lancaster Barnstormers, Atlantic League (independent) - 1 game 12-Aug
- Antonio Abell (outfielder, b. 1975, Kentucky)
- 1997: New Jersey Cardinals, New York-Penn League (short-season) - 1 game 27-Jun
- John Abercrombie (catcher/outfielder, b. 1969, Texas)
- Reggie Abercrombie (outfielder, b. 1980, Georgia)
- 2001: Wilmington Waves, South Atlantic League (Low-A) - 1 game 6-Aug
- 2003: Jacksonville Suns, Southern League (AA) - 1 game 23-Aug
- 2004: Lancaster JetHawks, California League (High-A) - 1 game 7-Aug
- 2006: Florida Marlins, Major League Baseball - 1 game 30-Jul
- 2009: Round Rock Express, Pacific Coast League (AAA) - 1 game 15-Aug
- 2010: Sioux Falls Pheasants, American Association (independent) - 1 game 24-Aug g2
- 2014: Winnipeg Goldeyes, American Association (independent) - 1 game 19-Jun
- 2015: Sussex County Miners, Can-Am League (independent) - 1 game 15-Jul
- 2018: Winnipeg Goldeyes, American Association (independent) - 1 game 24-Aug
- 2019: Winnipeg Goldeyes, American Association (independent) - 2 games 9-Jun g1 9-Jun g2
- Matt Abernathy (outfielder, b. 1973, Tennessee)
- 1995: Idaho Falls Padres, Pioneer League (rookie) - 1 game 10-Aug
- Samson Abernathy (pitcher, b. 1996, California)
- 2022: Evansville Otters, Frontier League (independent) - 1 game 5-Jul
- Blane Abeyta (pitcher, b. 1998, California)
- 2021: Tampa Tarpons, Low-A Southeast - 1 game 28-Aug g1
- 2021: Surprise Saguaros, Arizona Fall League - 1 game 16-Oct
- Philip Abner (pitcher, b. 2002, North Carolina)
- 2024: Salt River Rafters, Arizona Fall League - 1 game 12-Oct
- Alaska Abney (pitcher, b. 2000, Georgia)
- 2024: Surprise Saguaros, Arizona Fall League - 1 game 12-Oct
- Adam Abraham (catcher/infielder, b. 1987, Michigan)
- 2009: Lake County Captains, South Atlantic League (Low-A) - 1 game 6-Aug
- 2011: Kinston Indians, Carolina League (High-A) - 2 games 28-May 13-Aug
- 2012: Akron Aeros, Eastern League (AA) - 1 game 15-Sep
- Paul Abraham (pitcher, b. 1980, New York)
- 2007: San Antonio Missions, Texas League (AA) - 1 game 15-Aug
- CJ Abrams (infielder, b. 2000, Georgia)
- 2022: Washington Nationals, Major League Baseball - 1 game 26-Sep
- 2023: Washington Nationals, Major League Baseball - 1 game 6-Sep
- Adrian Abreu (catcher, b. 1991, Dominican Republic)
- Albert Abreu (pitcher, b. 1995, Dominican Republic)
- 2021: New York Yankees, Major League Baseball - 2 games 11-Apr 29-Jul
- Bobby Abreu (outfielder, b. 1974, Venezuela)
- 1998: Philadelphia Phillies, National League (MLB) - 3 games 11-Apr 13-Sep 20-Sep
- 1999: Philadelphia Phillies, National League (MLB) - 3 games 17-Sep 26-Sep 3-Oct
- 2000: Philadelphia Phillies, Major League Baseball - 3 games 11-Sep g1 11-Sep g2 24-Sep
- 2001: Philadelphia Phillies, Major League Baseball - 1 game 3-Sep
- 2002: Philadelphia Phillies, Major League Baseball - 1 game 7-Sep
- 2003: Philadelphia Phillies, Major League Baseball - 3 games 2-Aug g1 2-Aug g2 28-Sep
- 2004: Philadelphia Phillies, Major League Baseball - 2 games 17-Jun 11-Sep
- 2005: Philadelphia Phillies, Major League Baseball - 1 game 28-Sep
- 2006: New York Yankees, Major League Baseball - 1 game 27-Sep
- 2007: New York Yankees, Major League Baseball - 3 games 19-Sep 22-Sep 30-Sep
- 2008: New York Yankees, Major League Baseball - 1 game 29-Aug
- 2009: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 26-Aug
- 2010: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 22-Aug
- 2014: New York Mets, Major League Baseball - 1 game 17-Sep
- Bryan Abreu (pitcher, b. 1997, Dominican Republic)
- 2021: Houston Astros, Major League Baseball - 1 game 2-May
- 2022: Houston Astros, Major League Baseball - 1 game 20-Sep
- Dennys Abreu (infielder, b. 1978, Venezuela)
- 2001: West Tenn Diamond Jaxx, Southern League (AA) - 1 game 4-Aug
- 2004: Elmira Pioneers, Northeast League (independent) - 1 game 31-Jul
- 2006: Camden Riversharks, Atlantic League (independent) - 1 game 16-Sep
- 2007: Camden Riversharks, Atlantic League (independent) - 2 games 3-Jul 31-Aug
- 2008: Brockton Rox, Can-Am League (independent) - 1 game 24-Aug
- Etanislao (Tony) Abreu (infielder, b. 1984, Dominican Republic)
- 2003: Vero Beach Dodgers, Florida State League (High-A) - 1 game 28-Aug
- 2014: Fresno Grizzlies, Pacific Coast League (AAA) - 1 game 21-Aug g1
- Johany Abreu (infielder, b. 1984, Dominican Republic)
- 2006: Augusta Greenjackets, South Atlantic League (Low-A) - 1 game 15-Sep
- Jose Abreu (first baseman, b. 1987, Cuba)
- 2014: Chicago White Sox, Major League Baseball - 1 game 26-Aug
- 2019: Chicago White Sox, Major League Baseball - 1 game 1-Jun
- 2021: Chicago White Sox, Major League Baseball - 3 games 5-Jul 21-Aug 22-Aug
- 2023: Houston Astros, Major League Baseball - 1 game 24-Apr
- Juan Carlos Abreu (outfielder, b. 1997, Florida)
- 2016: GCL Red Sox, Gulf Coast League (rookie) - 1 game 27-Aug
- Miguel Abreu (infielder, b. 1984, Puerto Rico)
- 2010: Frederick Keys, Carolina League (High-A) - 1 game 7-Aug
- 2013: Reading Fightin Phils, Eastern League (AA) - 1 game 27-May
- 2013: Lehigh Valley IronPigs, International League (AAA) - 1 game 2-Sep
- Nelson Abreu (infielder, b. 1976, Venezuela)
- 1998: Rockford Cubbies, Midwest League (Low-A) - 1 game 19-Aug
- 1999: Elmira Pioneers, Northeast League (independent) - 1 game 17-Jul
- 2001: Camden Riversharks, Atlantic League (independent) - 1 game 13-May
- Osvaldo Abreu (infielder, b. 1994, Dominican Republic)
- 2014: Auburn Doubledays, New York-Penn League (short-season) - 3 games 4-Jul g2 30-Jul 15-Aug
- 2016: Potomac Nationals, Carolina League (High-A) - 1 game 28-May
- 2016: Glendale Desert Dogs, Arizona Fall League - 1 game 13-Oct
- 2017: Harrisburg Senators, Eastern League (AA) - 1 game 3-Sep
- 2018: Harrisburg Senators, Eastern League (AA) - 1 game 20-Jun
- 2019: Potomac Nationals, Carolina League (High-A) - 1 game 2-May
- 2024: Hagerstown Flying Boxcars, Atlantic League (independent) - 1 game 7-Aug
- Pablo Abreu (outfielder, b. 1999, Dominican Republic)
- 2019: Glendale Desert Dogs, Arizona Fall League - 2 games 16-Oct 19-Oct
- Wilyer Abreu (outfielder, b. 1999, Venezuela)
- 2022: Scottsdale Scorpions, Arizona Fall League - 2 games 12-Oct 15-Oct
- 2023: Boston Red Sox, Major League Baseball - 1 game 4-Sep
- 2024: Boston Red Sox, Major League Baseball - 1 game 20-May
- Winston Abreu (pitcher, b. 1977, Dominican Republic)
- 2006: Baltimore Orioles, Major League Baseball - 1 game 27-Sep
- 2009: Durham Bulls, International League (AAA) - 1 game 17-Sep
- 2013: Bridgeport Bluefish, Atlantic League (independent) - 1 game 7-Aug
- 2015: Joplin Blasters, American Association (independent) - 1 game 31-Jul
- Juan Manuel Abril (pitcher, b. 1998, Dominican Republic)
- 2021: Daytona Tortugas, Low-A Southeast - 1 game 26-Jun
- Jared Abruzzo (catcher, b. 1981, California)
- 2003: Cedar Rapids Kernels, Midwest League (Low-A) - 1 game 30-Jul
- Jordan Abruzzo (catcher, b. 1984, California)
- 2008: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 21-Aug 27-Aug
- Jeremy Accardo (pitcher, b. 1981, Arizona)
- 2004: San Jose Giants, California League (High-A) - 1 game 17-Aug
- Andury Acevedo (infielder, b. 1990, Dominican Republic)
- 2013: Staten Island Yankees, New York-Penn League (short-season) - 1 game 6-Aug
- 2014: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 23-Apr
- 2014: Staten Island Yankees, New York-Penn League (short-season) - 1 game 31-Jul
- Anthony Acevedo (outfielder, b. 1978, California)
- 2002: Lexington Legends, South Atlantic League (Low-A) - 1 game 14-Jul
- 2003: Round Rock Express, Texas League (AA) - 1 game 9-Aug
- Carlos Acevedo (outfielder, b. 1979, Dominican Republic)
- 2001: Lakewood BlueClaws, South Atlantic League (Low-A) - 2 games 13-Apr 7-May
- Carlos Acevedo (pitcher, b. 1994, Dominican Republic)
- 2018: Hagerstown Suns, South Atlantic League (Low-A) - 1 game 23-May
- Domingo Acevedo (pitcher, b. 1994, Dominican Republic)
- 2018: Trenton Thunder, Eastern League (AA) - 1 game 20-Jun
- 2022: Oakland Athletics, Major League Baseball - 2 games 12-Apr 14-Apr
- Freddy Acevedo (outfielder, b. 1981, Dominican Republic)
- 2002: Martinsville Astros, Appalachian League (rookie) - 1 game 14-Jul
- Hanley Acevedo (outfielder, b. 1999)
- 2019: GCL Blue Jays, Gulf Coast League (rookie) - 1 game 28-Aug
- Inocencio Acevedo (infielder, b. 1978, Dominican Republic)
- 2001: Savannah Sand Gnats, South Atlantic League (Low-A) - 1 game 7-Aug
- Jhohan Acevedo (outfielder, b. 1993, Venezuela)
- 2014: State College Spikes, New York-Penn League (short-season) - 2 games 2-Aug 15-Aug
- 2015: State College Spikes, New York-Penn League (short-season) - 1 game 8-Aug
- Juan Acevedo (pitcher, b. 1970, Mexico)
- 1997: New York Mets, National League (MLB) - 3 games 13-Sep 15-Sep g1 28-Sep
- 2000: Milwaukee Brewers, Major League Baseball - 1 game 13-Sep
- 2001: Florida Marlins, Major League Baseball - 1 game 31-Aug
- Stiven Acevedo (outfielder, b. 2002, Dominican Republic)
- 2021: FCL Orioles Black, Florida Complex League (rookie) - 3 games 24-Aug g1 26-Aug g1 26-Aug g2
- 2023: Delmarva Shorebirds, Carolina League (Low-A) - 1 game 7-Sep
- 2024: Delmarva Shorebirds, Carolina League (Low-A) - 1 game 12-May
- Yoneiry Acevedo (infielder, b. 2000, Dominican Republic)
- 2022: FCL Tigers, Florida Complex League (rookie) - 1 game 10-Jun
- Alfredo Aceves (pitcher, b. 1982, Mexico)
- 2009: New York Yankees, Major League Baseball - 1 game 28-Sep
- 2012: Boston Red Sox, Major League Baseball - 1 game 1-Oct
- Jonathan Aceves (catcher/1st base, b. 1978, Mexico)
- 2003: Kannapolis Intimidators, South Atlantic League (Low-A) - 1 game 13-Jul
- Jermy Acey (infielder, b. 1981, Texas)
- 2005: Auburn Doubledays, New York-Penn League (short-season) - 1 game 15-Sep
- 2007: Nashua Pride, Can-Am League (independent) - 2 games 7-Sep 9-Sep
- 2008: Orange County Flyers, Golden League (independent) - 2 games 26-Jul 1-Aug
- Trevor Achenbach (infielder, b. 1994, Nevada)
- 2022: Gateway Grizzlies, Frontier League (independent) - 2 games 6-Jul 13-Jul
- McKenzie Acker (pitcher, b. 1990, Washington)
- 2015: Quebec Les Capitales, Can-Am League (independent) - 1 game 14-Aug
- Eric Ackerman (pitcher, b. 1979, Pennsylvania)
- 2010: York Revolution, Atlantic League (independent) - 2 games 24-Sep 2-Oct
- Hunter Ackerman (pitcher, b. 1990, Virginia)
- 2014: Southern Illinois Miners, Frontier League (independent) - 1 game 27-Aug
- 2017: Evansville Otters, Frontier League (independent) - 1 game 31-Aug
- Scott Ackerman (catcher, b. 1979, Oregon)
- 2000: Harrisburg Senators, Eastern League (AA) - 1 game 7-Sep
- 2003: Harrisburg Senators, Eastern League (AA) - 1 game 5-Apr
- Dustin Ackley (infielder, b. 1988, North Carolina)
- 2013: Seattle Mariners, Major League Baseball - 1 game 23-Aug
- 2014: Seattle Mariners, Major League Baseball - 1 game 18-Aug
- 2015: New York Yankees, Major League Baseball - 3 games 12-Sep g1 12-Sep g2 20-Sep
- 2018: Salt Lake Bees, Pacific Coast League (AAA) - 2 games 7-Aug 9-Aug
- Daison Acosta (pitcher, b. 1998, Dominican Republic)
- 2022: Brooklyn Cyclones, South Atlantic League (High-A) - 1 game 8-May g2
- 2023: Binghamton Rumble Ponies, Eastern League (AA) - 1 game 26-Sep
- Domingo Acosta (pitcher, b. 1980, Dominican Republic)
- 2006: Atlantic City Surf, Atlantic League (independent) - 1 game 15-Jul
- 2006: Newark Bears, Atlantic League (independent) - 1 game 1-Aug
- Emilio Acosta (catcher, b. 1980, Venezuela)
- 1999: Johnson City Cardinals, Appalachian League (rookie) - 2 games 7-Aug g1 7-Aug g2
- 2000: Johnson City Cardinals, Appalachian League (rookie) - 1 game 2-Aug
- Manny Acosta (pitcher, b. 1981, Panama)
- 2002: Greensboro Bats, South Atlantic League (Low-A) - 1 game 14-Jul
- 2010: New York Mets, Major League Baseball - 4 games 19-Sep 29-Sep g1 2-Oct 3-Oct
- 2011: New York Mets, Major League Baseball - 1 game 11-Sep
- 2012: New York Mets, Major League Baseball - 3 games 8-Apr 19-Aug 11-Sep
- Matthew Acosta (outfielder, b. 1998, California)
- 2019: Tri-City Dust Devils, Northwest League (short-season) - 1 game 5-Jul
- Max Acosta (infielder, b. 2002, Venezuela)
- 2024: Surprise Saguaros, Arizona Fall League - 2 games 11-Oct 12-Oct
- Mayobanex Acosta (catcher, b. 1987, Dominican Republic)
- 2009: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 2-Sep
- 2010: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 5-Sep
- Melvi Acosta (pitcher, b. 1995, Venezuela)
- 2017: Elizabethton Twins, Appalachian League (rookie) - 1 game 26-Aug
- 2019: Fort Myers Miracle, Florida State League (High-A) - 2 games 24-Apr 28-Aug g2
- Victor Acosta (infielder, b. 1996, Venezuela)
- 2015: Lowell Spinners, New York-Penn League (short-season) - 1 game 19-Aug
- Victor Acosta (infielder, b. 2004, Dominican Republic)
- Mark Acre (pitcher, b. 1968, California)
- 1995: Oakland Athletics, American League (MLB) - 1 game 7-Aug
- Cory Acton (infielder, b. 1999, Florida)
- 2022: FCL Braves, Florida Complex League (rookie) - 1 game 22-Aug
- Bryan Acuna (infielder, b. 2005, New Hampshire)
- 2023: FCL Twins, Florida Complex League (rookie) - 1 game 19-Jun
- 2024: FCL Twins, Florida Complex League (rookie) - 1 game 25-Jul
- Francisco Acuna (infielder, b. 2000, Colombia)
- 2021: Bradenton Marauders, Low-A Southeast - 1 game 12-Sep
- 2023: Bradenton Marauders, Florida State League (Low-A) - 2 games 8-Jun 3-Jul
- Jose Acuna (pitcher, b. 2002, Texas)
- 2022: FCL Phillies, Florida Complex League (rookie) - 1 game 18-Jun
- Luisangel Acuna (infielder, b. 2002, Venezuela)
- 2021: Down East Wood Ducks, Low-A East - 1 game 17-Jun
- 2022: Surprise Saguaros, Arizona Fall League - 1 game 15-Oct
- 2023: Binghamton Rumble Ponies, Eastern League (AA) - 1 game 26-Sep
- 2024: New York Mets, Major League Baseball - 1 game 19-Sep
- Ron Acuna (outfielder, b. 1979, Venezuela)
- 2000: Pittsfield Mets, New York-Penn League (short-season) - 1 game 26-Aug
- 2004: Binghamton Mets, Eastern League (AA) - 1 game 3-Aug g1
- 2005: New Hampshire Fisher Cats, Eastern League (AA) - 1 game 2-Jul
- Ronald Acuna (outfielder, b. 1997, Venezuela)
- 2016: Rome Braves, South Atlantic League (Low-A) - 1 game 15-Sep
- 2017: Gwinnett Braves, International League (AAA) - 1 game 26-Jul
- 2018: Atlanta Braves, Major League Baseball - 4 games 25-May 28-Aug 26-Sep 28-Sep
- 2019: Atlanta Braves, Major League Baseball - 2 games 29-Apr 13-Aug
- 2020: Atlanta Braves, Major League Baseball - 1 game 13-Oct
- 2021: Atlanta Braves, Major League Baseball - 3 games 30-Apr 1-May 30-Jun
- 2022: Atlanta Braves, Major League Baseball - 4 games 3-May g2 15-Aug 25-Sep 26-Sep
- 2023: Atlanta Braves, Major League Baseball - 1 game 7-Jun
- Travis Adair (utility, b. 1987, South Carolina)
- 2010: Hickory Crawdads, South Atlantic League (Low-A) - 2 games 4-Jul 11-Sep
- 2012: Frederick Keys, Carolina League (High-A) - 1 game 3-Sep
- Jason Adam (pitcher, b. 1991, Kansas)
- Tyler Adamczyk (pitcher, b. 1982, North Carolina)
- 2003: Peoria Chiefs, Midwest League (Low-A) - 1 game 31-Jul
- Brady Adamek (pitcher, b. 1990, Colorado)
- 2014: New Jersey Jackals, Can-Am League (independent) - 1 game 4-Aug
- Jose Adames (pitcher, b. 1993, Dominican Republic)
- 2015: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 15-Apr
- 2024: Worcester Red Sox, International League (AAA) - 1 game 22-Sep
- Willy Adames (infielder, b. 1995, Dominican Republic)
- Joe Adametz (pitcher, b. 1999, Pennsylvania)
- 2023: Lakeland Flying Tigers, Florida State League (Low-A) - 1 game 15-Sep
- 2024: Lakeland Flying Tigers, Florida State League (Low-A) - 2 games 5-Apr 28-May
- Art Adams (pitcher, b. 1970, California)
- 1991: Bristol Tigers, Appalachian League (rookie) - 1 game 16-Aug
- Austin Adams (pitcher, b. 1986, Alabama)
- 2021: Lexington Legends, Atlantic League (independent) - 2 games 6-Aug 19-Sep
- Austin Adams (pitcher, b. 1991, Florida)
- 2021: San Diego Padres, Major League Baseball - 1 game 17-Sep
- 2024: Oakland Athletics, Major League Baseball - 1 game 30-May
- Blake Adams (outfielder, b. 1995, Texas)
- 2018: Winnipeg Goldeyes, American Association (independent) - 1 game 24-Aug
- Brian Adams (pitcher, b. 1977, South Carolina)
- 2004: Huntsville Stars, Southern League (AA) - 1 game 4-Jul
- 2009: Somerset Patriots, Atlantic League (independent) - 1 game 27-Sep
- Cameron Adams (catcher, b. 1994, Illinois)
- 2018: Normal CornBelters, Frontier League (independent) - 1 game 25-Aug g1
- Colt Adams (pitcher, b. 1985, Utah)
- 2006: Greeneville Astros, Appalachian League (rookie) - 1 game 19-Aug
- Colton Adams (infielder, b. 1997, Texas)
- 2021: Roswell Invaders, Pecos League (independent) - 1 game 20-Jul
- Cooper Adams (pitcher, b. 2000, Maryland)
- 2024: Mesa Solar Sox, Arizona Fall League - 1 game 9-Oct
- Dan Adams (pitcher, b. 1978, Washington)
- 2001: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 13-Apr
- 2003: Reading Phillies, Eastern League (AA) - 1 game 3-Apr
- Dave Adams (infielder, b. 1969)
- 1992: Waterloo Diamonds, Midwest League (Low-A) - 1 game 16-Aug g1
- David Adams (infielder, b. 1987, Florida)
- 2008: Staten Island Yankees, New York-Penn League (short-season) - 1 game 16-Jul
- 2012: Trenton Thunder, Eastern League (AA) - 2 games 5-Apr 15-Sep
- 2013: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 24-Apr
- Jake Adams (first baseman, b. 1995, South Dakota)
- 2017: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 22-Jul
- 2018: Buies Creek Astros, Carolina League (High-A) - 2 games 29-Aug 2-Sep
- 2019: Fayetteville Woodpeckers, Carolina League (High-A) - 1 game 4-May
- John Adams (outfielder, b. 1976, Kansas)
- Johnny Adams (infielder, b. 1994, Massachusetts)
- 2017: Everett AquaSox, Northwest League (short-season) - 1 game 3-Aug
- Jordyn Adams (outfielder, b. 1999, North Carolina)
- 2021: Tri-City Dust Devils, High-A West - 1 game 10-Jul
- 2022: Rocket City Trash Pandas, Southern League (AA) - 1 game 6-Aug
- Lane Adams (outfielder, b. 1989, Oklahoma)
- 2013: Omaha Storm Chasers, Pacific Coast League (AAA) - 1 game 17-Sep
- 2017: Gwinnett Braves, International League (AAA) - 1 game 26-Jul
- 2017: Atlanta Braves, Major League Baseball - 3 games 22-Aug 25-Sep g2 27-Sep
- 2018: Atlanta Braves, Major League Baseball - 1 game 28-Sep
- Mason Adams (pitcher, b. 2000, Florida)
- 2023: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 16-Jul
- Matt Adams (first baseman, b. 1988, Pennsylvania)
- 2011: Springfield Cardinals, Texas League (AA) - 1 game 2-Sep
- 2014: St. Louis Cardinals, Major League Baseball - 1 game 10-Aug
- 2016: St. Louis Cardinals, Major League Baseball - 2 games 29-May 27-Jul
- 2017: St. Louis Cardinals, Major League Baseball - 1 game 16-Apr
- 2017: Atlanta Braves, Major League Baseball - 3 games 25-Sep g1 25-Sep g2 27-Sep
- 2018: Washington Nationals, Major League Baseball - 1 game 15-Jul
- Mike Adams (pitcher, b. 1978, Texas)
- 2008: San Diego Padres, Major League Baseball - 2 games 28-Jul 20-Sep
- 2014: Lehigh Valley IronPigs, International League (AAA) - 1 game 1-Sep
- Mike Adams (pitcher, b. 1994, New Jersey)
- 2021: Lehigh Valley IronPigs, Triple-A East - 1 game 7-Sep
- Riley Adams (catcher, b. 1996, California)
- 2019: Dunedin Blue Jays, Florida State League (High-A) - 3 games 4-Apr 5-Apr 7-Apr
- 2022: Washington Nationals, Major League Baseball - 1 game 26-Sep
- 2023: Washington Nationals, Major League Baseball - 1 game 6-Sep
- 2024: Rochester Red Wings, International League (AAA) - 1 game 21-Sep
- Russ Adams (infielder, b. 1980, North Carolina)
- 2003: New Haven Ravens, Eastern League (AA) - 2 games 27-Jun 10-Sep
- 2004: Toronto Blue Jays, Major League Baseball - 2 games 20-Sep 21-Sep
- 2007: Toronto Blue Jays, Major League Baseball - 1 game 22-Sep
- Ryan Adams (infielder, b. 1987, Louisiana)
- 2011: Baltimore Orioles, Major League Baseball - 1 game 28-Aug day
- 2012: Norfolk Tides, International League (AAA) - 1 game 2-Sep
- 2014: New Jersey Jackals, Can-Am League (independent) - 2 games 1-Aug 8-Aug
- Terry Adams (pitcher, b. 1973, Alabama)
- 2003: Philadelphia Phillies, Major League Baseball - 1 game 2-Aug g2
- Travis Adams (pitcher, b. 2000, California)
- 2022: Fort Myers Mighty Mussels, Florida State League (Low-A) - 2 games 10-Apr 17-May
- Trever Adams (utility, b. 1988, Nebraska)
- 2012: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 11-Jul
- Tyler Adams (pitcher, b. 1998, Pennsylvania)
- Daniel Adamson (outfielder, b. 1987, Alabama)
- 2010: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 14-Sep
- Joel Adamson (pitcher, b. 1971, California)
- 1994: Portland Sea Dogs, Eastern League (AA) - 1 game 24-Jul
- Cody Adcock (pitcher, b. 2002, Texas)
- 2024: Daytona Tortugas, Florida State League (Low-A) - 2 games 16-May g1 27-May
- Ty Adcock (pitcher, b. 1997, North Carolina)
- 2022: Peoria Javelinas, Arizona Fall League - 2 games 12-Oct 15-Oct
- 2024: Syracuse Mets, International League (AAA) - 1 game 20-Sep
- Tyler Addison (pitcher, b. 1984, Georgia)
- 2006: Staten Island Yankees, New York-Penn League (short-season) - 1 game 28-Jul
- Jim Adduci (outfielder, b. 1985, British Columbia)
- 2011: Tennessee Smokies, Southern League (AA) - 1 game 12-Aug
- 2013: Round Rock Express, Pacific Coast League (AAA) - 1 game 22-Jul
- 2017: Toledo Mud Hens, International League (AAA) - 1 game 1-Sep
- 2018: Detroit Tigers, Major League Baseball - 1 game 19-Sep
- Jo Adell (outfielder, b. 1999, North Carolina)
- 2019: Mobile BayBears, Southern League (AA) - 1 game 28-Jul
- 2019: Mesa Solar Sox, Arizona Fall League - 3 games 15-Oct 18-Oct 19-Oct
- 2022: Los Angeles Angels, Major League Baseball - 2 games 22-Aug 25-Aug
- 2023: Los Angeles Angels, Major League Baseball - 1 game 21-Sep
- 2024: Los Angeles Angels, Major League Baseball - 4 games 15-Apr 16-Apr 17-Apr 18-Apr
- Aramis Ademan (infielder, b. 1998, Dominican Republic)
- 2017: Eugene Emeralds, Northwest League (short-season) - 1 game 29-Jul
- 2018: Myrtle Beach Pelicans, Carolina League (High-A) - 1 game 29-Aug
- Davis Adkins (pitcher, b. 1994, Georgia)
- 2016: Florence Freedom, Frontier League (independent) - 1 game 3-Jul
- James Adkins (pitcher, b. 1985, Tennessee)
- 2007: Great Lakes Loons, Midwest League (Low-A) - 1 game 6-Aug
- 2011: Carolina Mudcats, Southern League (AA) - 1 game 29-May
- Tim Adkins (pitcher, b. 1974, West Virginia)
- 1999: Bridgeport Bluefish, Atlantic League (independent) - 1 game 20-Jun
- 2001: Norwich Navigators, Eastern League (AA) - 1 game 29-Apr
- 2004: Trenton Thunder, Eastern League (AA) - 1 game 21-Jun
- Chase Adkison (catcher, b. 2000, California)
- 2024: Palm Beach Cardinals, Florida State League (Low-A) - 1 game 5-Jun
- Tyler Adkison (outfielder, b. 1995, California)
- 2017: Great Lakes Loons, Midwest League (Low-A) - 1 game 19-Aug
- Tim Adleman (pitcher, b. 1987, North Carolina)
- 2013: New Jersey Jackals, Can-Am League (independent) - 2 games 15-Aug 7-Sep
- Eric Adler (pitcher, b. 2000, Florida)
- 2024: Glendale Desert Dogs, Arizona Fall League - 1 game 11-Oct
- Carlos Adolfo (outfielder, b. 1976, Dominican Republic)
- 1994: Vermont Expos, New York-Penn League (short-season) - 1 game 19-Jun
- 1996: Delmarva Shorebirds, South Atlantic League (Low-A) - 1 game 25-Jul
- 1998: Harrisburg Senators, Eastern League (AA) - 1 game 17-Sep
- 1999: Harrisburg Senators, Eastern League (AA) - 3 games 10-Apr g1 10-Apr g2 6-Sep
- 2004: Coastal Bend Aviators, Central League (independent) - 1 game 3-Jul
- 2004: Atlantic City Surf, Atlantic League (independent) - 1 game 2-Sep
- 2005: Fort Worth Cats, Central League (independent) - 1 game 3-Sep
- Micker Adolfo (outfielder, b. 1996, Dominican Republic)
- 2017: Kannapolis Intimidators, South Atlantic League (Low-A) - 1 game 15-Aug
- 2019: Glendale Desert Dogs, Arizona Fall League - 2 games 15-Oct 19-Oct
- 2021: Birmingham Barons, Double-A South - 1 game 12-May
- 2021: Charlotte Knights, Triple-A East - 1 game 11-Aug
- 2022: Charlotte Knights, International League (AAA) - 2 games 16-Jul 22-Sep
- Ross Adolph (outfielder, b. 1996, Ohio)
- 2018: Brooklyn Cyclones, New York-Penn League (short-season) - 3 games 15-Jun 18-Jun 1-Jul
- Joan Adon (pitcher, b. 1998, Dominican Republic)
- 2022: Rochester Red Wings, International League (AAA) - 1 game 27-Sep
- 2023: Washington Nationals, Major League Baseball - 1 game 6-Sep
- Melvin Adon (pitcher, b. 1994, Dominican Republic)
- 2018: Scottsdale Scorpions, Arizona Fall League - 2 games 7-Nov 13-Nov
- 2019: Sacramento RiverCats, Pacific Coast League (AAA) - 1 game 17-Sep
- Ranfy Adon (outfielder, b. 1997, Dominican Republic)
- 2016: GCL Mets, Gulf Coast League (rookie) - 1 game 29-Aug g2
- Sharnol Adriana (infielder, b. 1970, Curacao)
- Ehire Adrianza (infielder, b. 1989, Venezuela)
- Jose Advincola (pitcher, b. 1980, Dominican Republic)
- 2000: Bluefield Orioles, Appalachian League (rookie) - 1 game 5-Aug g1
- Audie Afenir (catcher/first base, b. 1992, California)
- 2018: Gateway Grizzlies, Frontier League (independent) - 1 game 26-Aug
- Tom Afenir (catcher, b. 1971, California)
- 1996: Burlington Indians, Appalachian League (rookie) - 1 game 27-Jul g2
- Jeremy Affeldt (pitcher, b. 1979, Arizona)
- 2005: Kansas City Royals, Major League Baseball - 1 game 7-Aug
- 2009: San Francisco Giants, Major League Baseball - 1 game 21-Aug
- 2012: San Francisco Giants, Major League Baseball - 1 game 4-Jul
- Michael Affronti (infielder, b. 1984, New York)
- 2006: Vancouver Canadians, Northwest League (short-season) - 1 game 22-Aug
- Khalid Afify (pitcher, b. 1985, New York)
- 2008: Sussex Skyhawks, Can-Am League (independent) - 1 game 28-Aug
- Benny Agbayani (outfielder, b. 1971, Hawaii)
- 1995: Binghamton Mets, Eastern League (AA) - 1 game 21-Jul
- 1996: Norfolk Tides, International League (AAA) - 2 games 24-Aug 25-Aug
- 1998: New York Mets, National League (MLB) - 1 game 9-Jul
- 1999: New York Mets, National League (MLB) - 2 games 23-Jul 17-Sep
- 2000: New York Mets, Major League Baseball - 1 game 13-Sep
- 2001: New York Mets, Major League Baseball - 1 game 31-Aug
- Tommie Agee (outfielder, b. 1942, Alabama; d. 2001, New York)
- 1968: New York Mets, National League (MLB) - 1 game 16-Jun
- 1969: New York Mets, National League (MLB) - 1 game 29-Jun
- 1970: New York Mets, National League (MLB) - 1 game 13-Sep
- 1972: New York Mets, National League (MLB) - 1 game 25-Jun g1
- Sam Agnew-Wieland (pitcher, b. 1992, Georgia)
- 2013: Staten Island Yankees, New York-Penn League (short-season) - 1 game 6-Aug
- Marcos Agramonte (infielder, b. 1976, Dominican Republic)
- 2001: Savannah Sand Gnats, South Atlantic League (Low-A) - 2 games 7-Aug 10-Aug
- 2003: North Shore Spirit, Northeast League (independent) - 1 game 21-Jul
- 2005: North Shore Spirit, Can-Am League (independent) - 2 games 25-Jun 23-Jul
- 2006: Sussex Skyhawks, Can-Am League (independent) - 2 games 30-Jun 9-Jul
- Wilson Agramonte (first base/outfield, b. 1994, Dominican Republic)
- 2018: Dominican Republic, Can-Am League (independent) - 1 game 13-Jun
- Jason Agresti (catcher/outfielder, b. 1996, New York)
- 2018: Rockland Boulders, Can-Am League (independent) - 2 games 10-Jul g2 11-Jul
- Juaner Aguasvivas (first baseman, b. 1989, Dominican Republic)
- 2012: Connecticut Tigers, New York-Penn League (short-season) - 1 game 25-Aug
- Luis Aguayo (infielder, b. 1959, Puerto Rico)
- 1982: Philadelphia Phillies, National League (MLB) - 1 game 13-Apr
- Miguel Aguero (pitcher, b. 1982, Venezuela)
- 2004: New Jersey Cardinals, New York-Penn League (short-season) - 1 game 16-Jul g1
- Carlos Aguiar (outfielder, b. 2001, Venezuela)
- Chris Aguila (outfielder, b. 1979, California)
- 1999: Kane County Cougars, Midwest League (Low-A) - 1 game 5-Sep
- 2002: Portland Sea Dogs, Eastern League (AA) - 1 game 21-Apr
- 2008: New York Mets, Major League Baseball - 1 game 6-Jul
- 2010: Lehigh Valley IronPigs, International League (AAA) - 1 game 29-Jul
- Roidany Aguila (catcher, b. 1990, Cuba)
- 2013: South Bend Silver Hawks, Midwest League (Low-A) - 1 game 31-Aug
- Angel Aguilar (infielder, b. 1995, Venezuela)
- 2016: Staten Island Yankees, New York-Penn League (short-season) - 1 game 8-Aug
- 2018: Trenton Thunder, Eastern League (AA) - 1 game 7-Sep
- Bert Aguilar (first baseman, b. 1980)
- 2005: Coastal Bend Aviators, Central League (independent) - 1 game 18-Aug
- Carlo Aguilar (pitcher, b. 1975, Venezuela)
- 1996: Oneonta Yankees, New York-Penn League (short-season) - 1 game 17-Aug
- Cesar Aguilar (pitcher, b. 1992, California)
- 2012: Johnson City Cardinals, Appalachian League (rookie) - 1 game 17-Aug g1
- Clay Aguilar (pitcher, b. 1999, Texas)
- Heliezer Aguilar (outfielder, b. 1984, Venezuela)
- 2006: Pulaski Blue Jays, Appalachian League (rookie) - 1 game 19-Aug
- Jesus Aguilar (first baseman, b. 1990, Venezuela)
- 2011: Kinston Indians, Carolina League (High-A) - 1 game 13-Aug
- 2012: Akron Aeros, Eastern League (AA) - 1 game 15-Sep
- 2014: Columbus Clippers, International League (AAA) - 1 game 23-Aug
- 2017: Milwaukee Brewers, Major League Baseball - 1 game 29-May
- 2018: Milwaukee Brewers, Major League Baseball - 2 games 13-Apr 22-Sep
- 2019: Milwaukee Brewers, Major League Baseball - 1 game 4-Jun
- 2019: Tampa Bay Rays, Major League Baseball - 5 games 4-Aug 19-Aug 30-Aug 3-Sep g1 24-Sep
- 2021: Miami Marlins, Major League Baseball - 1 game 23-May
- 2022: Miami Marlins, Major League Baseball - 2 games 16-Apr 24-May
- 2023: Oakland Athletics, Major League Baseball - 1 game 9-Apr
- 2023: Gwinnett Stripers, International League (AAA) - 1 game 29-Jun
- Julian Aguiar (pitcher, b. 2001, California)
- 2022: Daytona Tortugas, Florida State League (Low-A) - 2 games 10-May 15-May
- Miguel Aguilar (pitcher, b. 1991, Mexico)
- 2019: Salt River Rafters, Arizona Fall League - 2 games 15-Oct 18-Oct
- Roinny Aguiar (infielder, b. 2005, Venezuela)
- 2024: FCL Pirates, Florida Complex League (rookie) - 1 game 4-May
- Ryan Aguilar (first base/outfield, b. 1994, California)
- 2018: Carolina Mudcats, Carolina League (High-A) - 1 game 2-Sep
- 2019: Biloxi Shuckers, Southern League (AA) - 2 games 10-Sep 11-Sep
- 2022: Rocket City Trash Pandas, Southern League (AA) - 1 game 6-Aug
- Sal Aguilar (pitcher, b. 1982, California)
- 2005: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 29-Jun 4-Aug
- Tayler Aguilar (outfielder, b. 2000, Colorado)
- Trino Aguilar (infielder, b. 1981, Venezuela)
- 2007: Pensacola Pelicans, American Association (independent) - 1 game 12-Aug
- Eric Aguilera (first baseman, b. 1990, Illinois)
- 2013: Orem Owlz, Pioneer League (rookie) - 1 game 19-Aug
- Gabriel Aguilera (pitcher, b. 2000, Venezuela)
- 2024: Daytona Tortugas, Florida State League (Low-A) - 2 games 19-May 5-Jun
- Rick Aguilera (pitcher, b. 1961, California)
- 1986: New York Mets, National League (MLB) - 1 game 14-Apr
- 1992: Minnesota Twins, American League (MLB) - 1 game 12-Aug
- 1993: Minnesota Twins, American League (MLB) - 1 game 22-Sep
- 2000: Chicago Cubs, Major League Baseball - 1 game 2-Sep
- Brad Agustin (infielder, b. 1987)
- 2010: Normal CornBelters, Frontier League (independent) - 1 game 3-Sep
- Jhaysson Agustin (catcher, b. 1985, Dominican Republic)
- 2006: Casper Rockies, Pioneer League (rookie) - 1 game 24-Aug
- Telmito Agustin (outfielder, b. 1996, U.S. Virgin Islands)
- 2016: Hagerstown Suns, South Atlantic League (Low-A) - 2 games 13-Jun 7-Sep
- 2018: Potomac Nationals, Carolina League (High-A) - 1 game 3-Sep
- 2019: Potomac Nationals, Carolina League (High-A) - 1 game 2-May
- Devan Ahart (outfielder, b. 1992, Michigan)
- 2014: Great Lakes Loons, Midwest League (Low-A) - 1 game 28-Aug
- 2019: Fargo-Moorhead RedHawks, American Association (independent) - 1 game 7-Jun
- Paul Ah Yat (pitcher, b. 1974, Hawaii)
- 1996: Erie SeaWolves, New York-Penn League (short-season) - 2 games 4-Aug 14-Aug
- Pat Ahearne (pitcher, b. 1969, California)
- 1994: Trenton Thunder, Eastern League (AA) - 1 game 8-Aug
- 1995: Toledo Mud Hens, International League (AAA) - 2 games 30-Apr 5-Aug
- 2005: Bridgeport Bluefish, Atlantic League (independent) - 2 games 15-Jun 25-Aug
- Dave Ahern (pitcher, b. 1987)
- 2011: New York Federals, Can-Am League (independent) - 2 games 22-Jul 28-Jul
- Steve Ahlers (infielder, b. 1978, California)
- 1999: Cedar Rapids Kernels, Midwest League (Low-A) - 1 game 4-Sep
- Asrar Ahmad (pitcher, b. 1988, Pakistan)
- 2016: Pakistan, World Baseball Classic - 1 game 23-Sep
- Nick Ahmed (infielder, b. 1990, Massachusetts)
- 2018: Arizona Diamondbacks, Major League Baseball - 2 games 18-Aug 19-Aug
- 2019: Arizona Diamondbacks, Major League Baseball - 1 game 17-Jul
- 2021: Arizona Diamondbacks, Major League Baseball - 1 game 19-Jul
- Jay Ahrendt (catcher, b. 1974, New Jersey)
- 1998: Atlantic City Surf, Atlantic League (independent) - 3 games 4-Jul 5-Jul 12-Jul
- Kevin Ahrens (infielder, b. 1989, Texas)
- 2011: Dunedin Blue Jays, Florida State League (High-A) - 1 game 10-Aug
- 2015: Mississippi Braves, Southern League (AA) - 1 game 26-Jul
- Alex Ahumada (infielder, b. 1979, Mexico)
- 1997: Lowell Spinners, New York-Penn League (short-season) - 1 game 26-Jul
- 2002: Trenton Thunder, Eastern League (AA) - 1 game 21-Apr
- Vincenzo Aiello (pitcher, b. 1994, New York)
- 2019: Jacksonville Jumbo Shrimp, Southern League (AA) - 1 game 10-Aug
- 2019: Salt River Rafters, Arizona Fall League - 1 game 18-Oct
- Craig Aikin (outfielder, b. 1993, Texas)
- 2015: State College Spikes, New York-Penn League (short-season) - 1 game 8-Aug
- Kurt Ainsworth (pitcher, b. 1978, Louisiana)
- 2000: Shreveport Captains, Texas League (AA) - 1 game 20-Aug
- Kurt Airoso (outfielder, b. 1975, California)
- 1996: Jamestown Jammers, New York-Penn League (short-season) - 1 game 16-Aug
- 2001: Erie SeaWolves, Eastern League (AA) - 1 game 8-Sep
- 2004: Erie SeaWolves, Eastern League (AA) - 1 game 4-Sep
- Phil Akens (pitcher, b. 1982, Maryland)
- 2003: Jupiter Hammerheads, Florida State League (High-A) - 1 game 26-Aug
- 2004: Stockton Ports, California League (High-A) - 1 game 19-Aug g2
- Mitchell Aker (pitcher, b. 1994, Virginia)
- 2016: Utica Unicorns, United Shore League (independent) - 1 game 6-Aug
- 2019: Winnipeg Goldeyes, American Association (independent) - 1 game 9-Jun g2
- Chad Akers (infielder, b. 1972, West Virginia)
- 1999: Tacoma Rainiers, Pacific Coast League (AAA) - 1 game 21-Aug
- Aaron Akin (pitcher, b. 1977, Kansas)
- 2002: Berkshire Black Bears, Northeast League (independent) - 1 game 28-Jun g2
- Keegan Akin (pitcher, b. 1995, Michigan)
- 2019: Norfolk Tides, International League (AAA) - 1 game 27-May
- 2022: Baltimore Orioles, Major League Baseball - 1 game 9-Apr
- 2024: Baltimore Orioles, Major League Baseball - 1 game 9-Jun
- Carlos Akins (outfielder, b. 1974, Oklahoma)
- 1996: Frederick Keys, Carolina League (High-A) - 1 game 26-Jul
- 1997: Frederick Keys, Carolina League (High-A) - 1 game 6-Apr
- Jared Akins (outfielder, b. 1996, California)
- 2021: Missoula PaddleHeads, Pioneer League (independent) - 1 game 9-Jul
- Jordan Akins (outfielder, b. 1992, Georgia)
- 2012: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 11-Jul
- 2013: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 25-May
- 2013: Spokane Indians, Northwest League (short-season) - 1 game 22-Aug
- Nick Akins (outfielder, b. 1987, California)
- 2009: Ogden Raptors, Pioneer League (rookie) - 1 game 17-Aug
- Riku Akiyama (pitcher, b. 1995, Japan)
- 2016: Shikoku Island, Can-Am League (independent) - 1 game 16-Jun
- Ben Aklinski (outfielder, b. 1996, Arizona)
- Efrain Alamo (outfielder, b. 1976, Puerto Rico)
- 1996: Asheville Tourists, South Atlantic League (Low-A) - 1 game 29-Aug
- 1999: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 11-Aug
- Tyler Alamo (catcher/first base, b. 1995, California)
- 2014: AZL Cubs, Arizona League (rookie) - 1 game 20-Jul
- Ruben Alaniz (pitcher, b. 1991, Texas)
- Yosvani Alarcon (catcher, b. 1984, Cuba)
- 2016: Cuban National Team, Can-Am League (independent) - 1 game 23-Jun
- Jesus Alastre (outfielder, b. 1996, Venezuela)
- 2017: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 15-Aug
- 2019: Clearwater Threshers, Florida State League (High-A) - 2 games 6-Apr 7-Apr
- Elvis Alayon (outfielder, b. 1974, New York)
- 1996: Lowell Spinners, New York-Penn League (short-season) - 1 game 3-Aug
- Max Alba (pitcher, b. 1999, Wisconsin)
- Jonathan Albaladejo (pitcher, b. 1972, Puerto Rico)
- 2007: Washington Nationals, Major League Baseball - 1 game 26-Sep
- 2008: Staten Island Yankees, New York-Penn League (short-season) - 1 game 5-Sep
- Michael Albaladejo (catcher, b. 1990, Florida)
- 2014: Camden Riversharks, Atlantic League (independent) - 2 games 2-Aug day 7-Aug
- Randy Albaladejo (catcher, b. 1973)
- 1994: Auburn Astros, New York-Penn League (short-season) - 1 game 13-Aug
- Randy Albaral (outfielder, b. 1977, Louisiana)
- 1997: St. Catharines Stompers, New York-Penn League (short-season) - 1 game 27-Jun
- 1998: Hagerstown Suns, South Atlantic League (Low-A) - 1 game 11-Jul
- Craig Albernaz (catcher, b. 1982, Massachusetts)
- 2006: Montgomery Biscuits, Southern League (AA) - 1 game 2-Sep
- Andrew Albers (pitcher, b. 1985, Saskatchewan)
- 2010: Quebec Les Capitales, Can-Am League (independent) - 1 game 19-Jun
- 2021: Canada, Americas Olympic Qualifier - 1 game 31-May
- Matt Albers (pitcher, b. 1983, Texas)
- 2009: Baltimore Orioles, Major League Baseball - 1 game 4-Oct
- Rashad Albert (outfielder, b. 1975, Florida)
- 1998: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 29-Aug
- Tim Albert (outfielder, b. 1968)
- 1992: Beloit Brewers, Midwest League (Low-A) - 1 game 11-Aug
- Alexander Alberto (pitcher, b. 2001, Dominican Republic)
- 2022: FCL Rays, Florida Complex League (rookie) - 1 game 13-Aug
- 2023: FCL Rays, Florida Complex League (rookie) - 1 game 8-Jul
- 2024: FCL Rays, Florida Complex League (rookie) - 1 game 22-Jun
- 2024: Mesa Solar Sox, Arizona Fall League - 1 game 10-Oct
- Eddy Alberto (pitcher, b. 2002, Dominican Republic)
- 2023: FCL Orioles, Florida Complex League (rookie) - 1 game 9-Jun
- 2024: FCL Orioles, Florida Complex League (rookie) - 1 game 4-May
- Hanser Alberto (infielder, b. 1992, Dominican Republic)
- 2012: Myrtle Beach Pelicans, Carolina League (High-A) - 1 game 8-Aug
- 2019: Baltimore Orioles, Major League Baseball - 1 game 3-Sep g1
- 2021: Kansas City Royals, Major League Baseball - 1 game 16-Sep
- Justin Albertson (outfielder, b. 1979, California)
- 1999: Johnson City Cardinals, Appalachian League (rookie) - 1 game 7-Aug g1
- 2000: Johnson City Cardinals, Appalachian League (rookie) - 1 game 2-Aug
- Ozzie Albies (infielder, b. 1997, Curacao)
- Lou Albrecht (catcher, b. 2001, Washington)
- Eric Albright (pitcher, b. 1977, California)
- 2002: Daytona Cubs, Florida State League (High-A) - 1 game 23-Aug
- Al Alburquerque (pitcher, b. 1986, Dominican Republic)
- 2011: Detroit Tigers, Major League Baseball - 1 game 30-Sep
- Arian Alcala (infielder, b. 1979, Cuba)
- 2002: Lowell Spinners, New York-Penn League (short-season) - 1 game 4-Jul
- Jason Alcala (pitcher, b. 1980, Venezuela)
- 2001: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 13-Apr
- Jorge Alcala (pitcher, b. 1995, Dominican Republic)
- 2024: Minnesota Twins, Major League Baseball - 1 game 2-Sep
- Luis Alcala (pitcher, b. 2000, Venezuela)
- 2023: FCL Phillies, Florida Complex League (rookie) - 2 games 29-Jul 22-Aug
- Roney Alcala (infielder, b. 1994, Venezuela)
- 2014: AZL Cubs, Arizona League (rookie) - 1 game 20-Jul
- Eliander Alcalde (pitcher, b. 2003, Venezuela)
- Aris Alcantara (first baseman, b. 1990, Dominican Republic)
- 2012: Danville Braves, Appalachian League (rookie) - 2 games 14-Aug 18-Aug
- Arismendy Alcantara (utility, b. 1991, Dominican Republic)
- 2014: Chicago Cubs, Major League Baseball - 1 game 20-Jul
- Ervin Alcantara (outfielder, b. 1980, Dominican Republic)
- 2006: Salem Avalanche, Carolina League (High-A) - 1 game 14-Apr
- 2007: New Haven County Cutters, Can-Am League (independent) - 1 game 23-Aug
- Ismael Alcantara (outfielder, b. 1998, Dominican Republic)
- 2023: Great Lakes Loons, Midwest League (High-A) - 1 game 28-Jun
- Izzy Alcantara (infielder, b. 1973, Dominican Republic)
- 1999: Trenton Thunder, Eastern League (AA) - 1 game 29-Apr
- 2001: Pawtucket Red Sox, International League (AAA) - 1 game 13-Jul
- Kevin Alcantara (outfielder, b. 2002, Dominican Republic)
- 2023: Mesa Solar Sox, Arizona Fall League - 3 games 11-Oct 13-Oct 14-Oct
- 2024: Iowa Cubs, International League (AAA) - 1 game 21-Sep
- Mario Alcantara (pitcher, b. 1992, Dominican Republic)
- 2014: Lowell Spinners, New York-Penn League (short-season) - 2 games 31-Jul 13-Aug g2
- Randy Alcantara (pitcher, b. 1996, Dominican Republic)
- 2017: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 9-Aug
- Sandy Alcantara (pitcher, b. 1995, Dominican Republic)
- 2018: Miami Marlins, Major League Baseball - 1 game 30-Sep
- 2021: Miami Marlins, Major League Baseball - 1 game 25-Sep
- 2023: Miami Marlins, Major League Baseball - 3 games 4-Apr 26-Jul 29-Aug
- Sergio Alcantara (infielder, b. 1996, Dominican Republic)
- 2023: Reno Aces, Pacific Coast League (AAA) - 1 game 8-Aug
- Victor Alcantara (pitcher, b. 1993, Dominican Republic)
- 2013: Orem Owlz, Pioneer League (rookie) - 1 game 19-Aug
- 2016: Scottsdale Scorpions, Arizona Fall League - 1 game 12-Oct
- 2017: Toledo Mud Hens, International League (AAA) - 1 game 1-Sep
- 2019: Detroit Tigers, Major League Baseball - 1 game 19-Sep
- Jason Alcott (catcher, b. 1981, Pennsylvania)
- 2005: Windy City Thunderbolts, Frontier League (independent) - 1 game 29-Jul
- 2006: Sussex Skyhawks, Can-Am League (independent) - 1 game 9-Jul
- Samuel Aldegheri (pitcher, b. 2001, Italy)
- Jimmy Alder (infielder, b. 1972, Tennessee)
- 1991: Bristol Tigers, Appalachian League (rookie) - 1 game 16-Aug
- Kemp Alderman (outfielder, b. 2002, Mississippi)
- Scott Aldred (pitcher, b. 1968, Michigan)
- 1998: Tampa Bay Devil Rays, American League (MLB) - 1 game 27-Sep
- 2004: Somerset Patriots, Atlantic League (independent) - 2 games 22-May 19-Jun g1
- Carter Aldrete (infielder, b. 1997, California)
- 2021: Eugene Emeralds, High-A West - 1 game 13-Jul
- 2022: Richmond Flying Squirrels, Eastern League (AA) - 1 game 1-Sep
- Mike Aldrete (first base/outfield, b. 1961, California)
- Daniel Aldrich (outfielder, b. 1990, Germany)
- 2014: Bisbee Blue, Pecos League (independent) - 1 game 19-Jul
- Cory Aldridge (outfielder, b. 1979, Texas)
- 2007: Birmingham Barons, Southern League (AA) - 1 game 17-Aug
- 2008: Newark Bears, Atlantic League (independent) - 1 game 19-Jun
- 2008: Northwest Arkansas Naturals, Texas League (AA) - 1 game 11-Aug
- 2013: Somerset Patriots, Atlantic League (independent) - 4 games 7-Aug 20-Sep 28-Sep 29-Sep
- Reza Aleaziz (pitcher, b. 1995, Oregon)
- 2021: Ogden Raptors, Pioneer League (independent) - 1 game 9-Jul
- Benjamin Alegria (infielder, b. 1997, Nicaragua)
- 2021: Nicaragua, Americas Olympic Qualifier - 1 game 2-Jun
- Jose Alejandro (pitcher, b. 1995, Dominican Republic)
- Stephen Alemais (infielder, b. 1995, New York)
- 2016: West Virginia Black Bears, New York-Penn League (short-season) - 1 game 14-Aug
* Carlos Aleman - see Eladio Rodriguez
- Luis Alen (catcher, b. 1985, Venezuela)
- 2014: Winnipeg Goldeyes, American Association (independent) - 1 game 19-Jun
- 2018: Sussex County Miners, Can-Am League (independent) - 3 games 12-Jun g1 8-Sep 14-Sep
- 2021: Nicaragua, Americas Olympic Qualifier - 1 game 2-Jun
- Alexis Alexander (outfielder, b. 1982, Ohio)
- 2002: Spokane Indians, Northwest League (short-season) - 2 games 11-Aug 12-Aug
- Blaze Alexander (infielder, b. 1999, Florida)
- 2021: Hillsboro Hops, High-A West - 1 game 10-Jul
- 2023: Reno Aces, Pacific Coast League (AAA) - 1 game 8-Aug
- Chad Alexander (outfielder, b. 1974, Virginia)
- 1999: New Orleans Zephyrs, Pacific Coast League (AAA) - 1 game 4-Jul
- 2002: Toledo Mud Hens, International League (AAA) - 1 game 26-Jul
- CJ Alexander (infielder, b. 1996, Indiana)
- 2019: Mississippi Braves, Southern League (AA) - 1 game 10-Aug
- 2022: Northwest Arkansas Naturals, Texas League (AA) - 1 game 5-Aug
- Corey Alexander (pitcher, b. 1989)
- 2014: Traverse City Beach Bums, Frontier League (independent) - 1 game 27-Aug
- Dayton Alexander (outfielder, b. 1991, Hawaii)
- 2014: Vermont Lake Monsters, New York-Penn League (short-season) - 1 game 28-Jul
- Evan Alexander (outfielder, b. 1998, Texas)
- Garrett Alexander (pitcher, b. 1996, Texas)
- 2022: Cleburne Railroaders, American Association (independent) - 1 game 10-Jul
- Gerald Alexander (pitcher, b. 1968, Louisiana)
- 1990: Oklahoma City 89ers, American Association (AAA) - 1 game 18-Aug
- Hill Alexander (outfielder, b. 1996, Texas)
- 2021: Bowling Green Hot Rods, High-A East - 1 game 1-Jul
- 2022: Cleburne Railroaders, American Association (independent) - 1 game 10-Jul
- Jason Alexander (pitcher, b. 1993, California)
- 2023: Biloxi Shuckers, Southern League (AA) - 1 game 20-Jun
- 2024: Worcester Red Sox, International League (AAA) - 1 game 22-Sep
- John Alexander (first baseman, b. 1993, California)
- 2012: Princeton Rays, Appalachian League (rookie) - 2 games 17-Aug g1 17-Aug g2
- 2013: Hudson Valley Renegades, New York-Penn League (short-season) - 2 games 2-Aug 14-Aug
- Jordy Alexander (pitcher, b. 1977, Alberta)
- 2005: New Haven County Cutters, Can-Am League (independent) - 1 game 25-Jun
- Manny Alexander (infielder, b. 1971, Dominican Republic)
- 1994: Rochester Red Wings, International League (AAA) - 1 game 12-Aug
- 1996: Baltimore Orioles, American League (MLB) - 1 game 13-Jul g2
- 1999: Chicago Cubs, National League (MLB) - 1 game 23-Jul
- Scott Alexander (pitcher, b. 1989, California)
- 2019: Los Angeles Dodgers, Major League Baseball - 1 game 21-May
- 2023: San Francisco Giants, Major League Baseball - 1 game 11-Aug
- 2024: Oakland Athletics, Major League Baseball - 1 game 30-May
- Steve Alexander (first baseman, b. 1985)
- 2010: Normal CornBelters, Frontier League (independent) - 1 game 3-Sep
- Tyler Alexander (pitcher, b. 1994, Illinois)
- 2021: Detroit Tigers, Major League Baseball - 1 game 3-Oct
- 2023: Detroit Tigers, Major League Baseball - 1 game 1-Apr
- 2024: Tampa Bay Rays, Major League Baseball - 4 games 31-Mar 6-May 30-May 26-Sep
- A.J. Alexy (pitcher, b. 1998, Pennsylvania)
- 2019: Surprise Saguaros, Arizona Fall League - 1 game 16-Oct
- Gabriel Alfaro (pitcher, b. 1983, Venezuela)
- 2010: Camden Riversharks, Atlantic League (independent) - 1 game 15-Aug
- Jason Alfaro (infielder, b. 1977, Texas)
- 2006: Buffalo Bisons, International League (AAA) 4-Jul
- Jorge Alfaro (catcher, b. 1993, Colombia)
- 2012: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 11-Jul
- 2013: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 25-May
- 2016: Reading Fightin Phils, Eastern League (AA) - 2 games 8-Sep 10-Sep
- 2016: Philadelphia Phillies, Major League Baseball - 1 game 25-Sep
- 2017: Lehigh Valley IronPigs, International League (AAA) - 1 game 26-Jul
- 2018: Philadelphia Phillies, Major League Baseball - 1 game 9-Jul g2
- 2019: Miami Marlins, Major League Baseball - 3 games 1-Apr 4-Jun 27-Sep
- Angel Alfonseca (pitcher, b. 2001, Dominican Republic)
- 2023: St. Lucie Mets, Florida State League (Low-A) - 1 game 24-Aug
- Antonio Alfonseca (pitcher, b. 1972, Dominican Republic)
- 1998: Florida Marlins, National League (MLB) - 1 game 18-Sep
- 2007: Philadelphia Phillies, Major League Baseball - 2 games 27-Aug 23-Sep
- 2010: Bridgeport Bluefish, Atlantic League (independent) - 1 game 2-Oct
- Miguel Alfonseca (pitcher, b. 2000, Dominican Republic)
- 2022: St. Lucie Mets, Florida State League (Low-A) - 2 games 17-Apr 11-Aug
- 2023: St. Lucie Mets, Florida State League (Low-A) - 3 games 25-Apr 30-Apr 11-Jun
- 2024: St. Lucie Mets, Florida State League (Low-A) - 1 game 5-Jun
- Pedro Alfonseca (pitcher, b. 1997, Dominican Republic)
- 2023: Daytona Tortugas, Florida State League (Low-A) - 1 game 30-Jul
- Orlando Alfonso (pitcher, b. 1989, Puerto Rico)
- 2011: Aberdeen IronBirds, New York-Penn League (short-season) - 1 game 21-Jul
- Edgar Alfonzo (infielder, b. 1967, Venezuela)
- 1993: Bowie Baysox, Eastern League (AA) - 1 game 9-Aug
- 1994: Bowie Baysox, Eastern League (AA) - 1 game 10-Jul
- Edgar Alfonzo (pitcher, b. 1984, Venezuela)
- 2004: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 23-Aug
- Edgardo Alfonzo (infielder, b. 1973, Venezuela)
- Eliezer Alfonzo (catcher, b. 1979, Venezuela)
- 1998: New Jersey Cardinals, New York-Penn League (short-season) - 1 game 25-Jul
- 2003: St. Paul Saints, Northern League (independent) - 1 game 27-Jul
- Eliezer Alfonzo (catcher, b. 1999, Venezuela)
- 2021: Lakeland Flying Tigers, Low-A Southeast - 2 games 30-Jul 12-Aug
- 2022: Lakeland Flying Tigers, Florida State League (Low-A) - 1 game 11-Jun
- 2023: Erie SeaWolves, Eastern League (AA) - 1 game 26-Sep
- Giovanny Alfonzo (infielder, b. 1992, Venezuela)
- 2016: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 22-Aug
- 2017: Long Island Ducks, Atlantic League (independent) - 3 games 15-Jun 22-Sep 23-Sep
- 2019: High Point Rockers, Atlantic League (independent) - 1 game 3-May
- Omar Alfonzo (catcher/first base, b. 2003, Minnesota)
- Anthony Alford (outfielder, b. 1994, Mississippi)
- 2016: Dunedin Blue Jays, Florida State League (High-A) - 1 game 24-Aug
- 2016: Mesa Solar Sox, Arizona Fall League - 2 games 11-Oct 13-Oct
- 2017: New Hampshire Fisher Cats, Eastern League (AA) - 1 game 14-Apr
- 2018: Toronto Blue Jays, Major League Baseball - 1 game 21-Sep
- 2019: Toronto Blue Jays, Major League Baseball - 2 games 6-Sep 8-Sep
- 2021: Pittsburgh Pirates, Major League Baseball - 1 game 1-Oct
- Tom Alfredson (infielder, b. 1965, Bahamas)
- 1990: Williamsport Bills, Eastern League (AA) - 1 game 11-Aug
- Aydan Alger (pitcher, b. 2000, California)
- 2024: Grand Junction Jackalopes, Pioneer League (independent) - 1 game 16-Jul
- Brandon Alger (pitcher, b. 1991, Indiana)
- 2014: Surprise Saguaros, Arizona Fall League - 1 game 10-Oct
- Jose Alguacil (infielder, b. 1972, Venezuela)
- Jawad Ali (first baseman, b. 1993, Pakistan)
- 2016: Pakistan, World Baseball Classic - 1 game 23-Sep
- Angel Alicea (pitcher, b. 1994, Puerto Rico)
- 2017: Vancouver Canadians, Northwest League (short-season) - 1 game 4-Aug
- Luis Alicea (infielder, b. 1965, Puerto Rico)
- 1991: St. Louis Cardinals, National League (MLB) - 1 game 22-Sep
- 1992: St. Louis Cardinals, National League (MLB) - 2 games 22-Apr 18-Aug
- 1997: Anaheim Angels, American League (MLB) - 2 games 27-Jul 27-Aug
- 1998: Texas Rangers, American League (MLB) - 1 game 24-Aug
- 2000: Texas Rangers, Major League Baseball - 1 game 25-Aug
- 2002: Kansas City Royals, Major League Baseball - 1 game 21-Jun
- Humberto Aliendo (outfielder, b. 1980, Venezuela)
- 2001: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 13-Apr
- 2002: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 25-Jul
- Pablo Aliendo (catcher, b. 2001, Venezuela)
- 2021: Myrtle Beach Pelicans, Low-A East - 1 game 18-Jun
- 2022: South Bend Cubs, Midwest League (High-A) - 1 game 25-Jun
- Matt Alifano (infielder, b. 2000, New York)
- Anthony Aliotti (first baseman, b. 1987, Idaho)
- 2015: Nashville Sounds, Pacific Coast League (AAA) - 1 game 27-Jul
- Jeff Alkire (pitcher, b. 1969)
- 1996: Portland Sea Dogs, Eastern League (AA) - 1 game 5-Apr
- Scott Allan (pitcher, b. 1978, New Jersey)
- 2001: New Jersey Jackals, Northeast League (independent) - 1 game 1-Sep
- 2002: New Jersey Jackals, Northeast League (independent) - 1 game 16-Jul
- Andy Allanson (catcher, b. 1961, Virginia)
- 1988: Cleveland Indians, American League (MLB) - 1 game 27-Jun
- Kolby Allard (pitcher, b. 1997, California)
- 2016: Rome Braves, South Atlantic League (Low-A) - 1 game 15-Sep
- 2019: Gwinnett Stripers, International League (AAA) - 2 games 1-May 27-May
- 2021: Texas Rangers, Major League Baseball - 1 game 13-Apr
- 2024: Philadelphia Phillies, Major League Baseball - 1 game 19-Sep
- Alex Allbritton (infielder, b. 1990, Colorado)
- 2013: Orem Owlz, Pioneer League (rookie) - 1 game 19-Aug
- Forrestt Allday (outfielder, b. 1991, Texas)
- 2019: Lincoln Saltdogs, American Association (independent) - 1 game 16-Jul
- Matt Allegra (outfielder, b. 1981, Georgia)
- 2003: Midland Rockhounds, Texas League (AA) - 1 game 9-Aug
- Blake Allemand (infielder, b. 1992, Texas)
- 2015: Wisconsin Timber Rattlers, Midwest League (Low-A) - 2 games 31-Aug 2-Sep
- 2016: Brevard County Manatees, Florida State League (High-A) - 1 game 25-Aug
- 2019: San Antonio Missions, Pacific Coast League (AAA) - 2 games 15-Jul 21-Jul
- 2020: Chicago Dogs, American Association (independent) - 1 game 21-Jul
- Austin Allen (catcher, b. 1994, Missouri)
- 2018: Peoria Javelinas, Arizona Fall League - 3 games 10-Nov 14-Nov 17-Nov
- 2022: Oakland Athletics, Major League Baseball - 1 game 14-Apr
- 2023: Jacksonville Jumbo Shrimp, International League (AAA) - 1 game 23-Sep
- Brad Allen (pitcher, b. 1989, Illinois)
- 2014: Lansing Lugnuts, Midwest League (Low-A) - 1 game 24-Aug
- Brady Allen (outfielder, b. 1999, Florida)
- 2022: Jupiter Hammerheads, Florida State League (Low-A) - 2 games 19-May 20-Aug
- Brandon Allen (first baseman, b. 1986, Texas)
- 2009: Reno Aces, Pacific Coast League (AAA) - 1 game 15-Aug
- 2011: Oakland Athletics, Major League Baseball - 1 game 23-Aug
- Brian Allen (pitcher, b. 1979, Georgia)
- 2006: Montgomery Biscuits, Southern League (AA) - 1 game 2-Sep
- Chad Allen (outfielder, b. 1975, Texas)
- 1997: New Britain Rock Cats, Eastern League (AA) - 1 game 3-Aug
- 1998: New Britain Rock Cats, Eastern League (AA) - 3 games 2-Aug 30-Aug 17-Sep
- 2002: Buffalo Bisons, International League (AAA) - 1 game 1-Sep
- 2005: Memphis Redbirds, Pacific Coast League (AAA) - 1 game 19-Aug
- Chris Allen (pitcher, b. 1984, Pennsylvania)
- 2010: New Jersey Jackals, Can-Am League (independent) - 2 games 31-May 19-Jun
- Chris Allen (first base/outfield, b. 1991, California)
- 2014: Bisbee Blue, Pecos League (independent) - 1 game 19-Jul
- Cody Allen (pitcher, b. 1988, Florida)
- 2015: Cleveland Indians, Major League Baseball - 2 games 20-Aug 25-Aug
- 2017: Cleveland Indians, Major League Baseball - 1 game 2-Sep
- Dusty Allen (outfielder, b. 1972, Oklahoma)
- 1998: Las Vegas Stars, Pacific Coast League (AAA) - 1 game 17-Aug
- Greg Allen (outfielder, b. 1993, California)
- 2014: Mahoning Valley Scrappers, New York-Penn League (short-season) - 1 game 29-Aug
- 2016: Mesa Solar Sox, Arizona Fall League - 2 games 11-Oct 13-Oct
- 2017: Cleveland Indians, Major League Baseball - 1 game 2-Sep
- 2019: Cleveland Indians, Major League Baseball - 3 games 1-Jun 30-Aug 19-Sep
- Jay Allen (outfielder, b. 2002, Florida)
- Jeff Allen (outfielder, b. 1976, New Jersey)
- 2000: Shreveport Captains, Texas League (AA) - 1 game 20-Aug
- John Allen (first base/outfield, b. 1981, Texas)
- 2005: Fort Worth Cats, Central League (independent) - 1 game 3-Sep
- Josh Allen (infielder, b. 1991, Florida)
- 2017: Evansville Otters, Frontier League (independent) - 1 game 31-Aug
- 2018: Binghamton Rumble Ponies, Eastern League (AA) - 1 game 20-Jun
- Logan Allen (pitcher, b. 1997, Florida)
- 2021: Columbus Clippers, Triple-A East - 1 game 8-Aug
- Luke Allen (outfielder, b. 1978, Georgia; d. 2022, Georgia)
- Marlon Allen (first baseman, b. 1973, Georgia)
- 1997: Chattanooga Lookouts, Southern League (AA) - 2 games 10-Aug 13-Aug
- Neil Allen (pitcher, b. 1958, Kansas)
- 1982: New York Mets, National League (MLB) - 1 game 13-Apr
- 1985: St. Louis Cardinals, National League (MLB) - 1 game 9-Apr
- Nick Allen (infielder, b. 1998, California)
- 2018: Beloit Snappers, Midwest League (Low-A) - 1 game 6-Aug
- 2019: Mesa Solar Sox, Arizona Fall League - 3 games 15-Oct 18-Oct 19-Oct
- 2023: Oakland Athletics, Major League Baseball - 1 game 7-Aug
- Rod Allen (outfielder, b. 1982, California)
- Rodney Allen (pitcher, b. 1974, West Virginia)
- 2000: Stockton Mudville Nine, California League (High-A) - 1 game 2-Sep
- Ron Allen (pitcher, b. 1970)
- 1994: Reading Phillies, Eastern League (AA) - 1 game 8-Aug
- Scott Allen (catcher, b. 1978, New York)
- 2002: Berkshire Black Bears, Northeast League (independent) - 2 games 28-Jun g2 28-Aug
- Tanner Allen (outfielder, b. 1998, Alabama)
- Taylor Allen (pitcher, b. 1983, Texas)
- 2007: Amarillo Dillas, United League (independent) - 1 game 13-Aug
- Trever Allen (outfielder, b. 1991, Arizona)
- 2015: Burlington Bees, Midwest League (Low-A) - 1 game 28-Aug
- Will Allen (catcher/first base, b. 1992, Florida)
- 2017: Lakeland Flying Tigers, Florida State League (High-A) - 1 game 28-May
- Jermaine Allensworth (outfielder, b. 1972, Indiana)
- 1996: Pittsburgh Pirates, National League (MLB) - 1 game 10-Aug
- 1997: Pittsburgh Pirates, National League (MLB) - 2 games 13-Aug 24-Sep
- 1998: New York Mets, National League (MLB) - 1 game 18-Sep
- Charles (Chip) Alley (catcher, b. 1976, Virginia)
- 2001: Bowie Baysox, Eastern League (AA) - 1 game 22-Aug
- Josh Alley (outfielder, b. 1983, Illinois)
- 2010: St. Paul Saints, American Association (independent) - 1 game 21-Aug
- Nick Allgeyer (pitcher, b. 1996, Missouri)
- 2019: Dunedin Blue Jays, Florida State League (High-A) - 3 games 6-Apr 10-May 9-Aug
- Stetson Allie {outfielder, b. 1991, Florida)
- 2015: Altoona Curve, Eastern League (AA) - 1 game 22-Aug
- 2019: Oklahoma City Dodgers, Pacific Coast League (AAA) - 1 game 21-Jul
- Terrell Alliman (outfielder, b. 1988, Ontario)
- 2009: Orem Owlz, Pioneer League (rookie) - 1 game 18-Aug
- Chris Allison (infielder, b. 1971, Illinois)
- 1996: Trenton Thunder, Eastern League (AA) - 1 game 27-Aug
- Cody Allison (catcher/first base, b. 1974, Texas)
- 1996: Burlington Indians, Appalachian League (rookie) - 1 game 27-Jul g1
- 1997: Watertown Indians, New York-Penn League (short-season) - 1 game 25-Jul
- 1999: Kinston Indians, Carolina League (High-A) - 1 game 9-Aug
- Jeff Allison (pitcher, b. 1984, Massaschusetts)
- 2005: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 9-Jul
- Tom Allison (infielder, b. 1967, Oregon)
- 1990: Pittsfield Mets, New York-Penn League (short-season) - 1 game 17-Aug
- 1993: Binghamton Mets, Eastern League (AA) - 2 games 29-Aug 5-Sep
- Josh Alliston (pitcher, b. 1980, California)
- 2002: Ogden Raptors, Pioneer League (rookie) - 1 game 16-Aug
- John Allman (outfielder, b. 1985, Missouri)
- 2009: Lake County Captains, South Atlantic League (Low-A) - 1 game 6-Aug
- Benjamin Ally (pitcher, b. 1979, Florida)
- 2002: Martinsville Astros, Appalachian League (rookie) - 1 game 14-Jul
- Breland Almadova (outfielder, b. 1990, Hawaii)
- 2013: South Bend Silver Hawks, Midwest League (Low-A) - 1 game 31-Aug
- 2018: Sussex County Miners, Can-Am League (independent) - 4 games 12-Jun g1 12-Jun g2 8-Sep 14-Sep
- 2019: High Point Rockers, Atlantic League (independent) - 1 game 3-May
- 2021: Lexington Legends, Atlantic League (independent) - 2 games 4-Sep 19-Sep
- Armando Almanza (pitcher, b. 1972, Texas)
- 1998: Memphis Redbirds, Pacific Coast League (AAA) - 1 game 26-Aug
- 2002: Florida Marlins, Major League Baseball - 1 game 3-Sep g2
- 2003: Florida Marlins, Major League Baseball - 1 game 29-Jun
- 2005: Memphis Redbirds, Pacific Coast League (AAA) - 1 game 19-Aug
- Carlos Almanzar (pitcher, b. 1973, Dominican Republic)
- 1997: Toronto Blue Jays, American League (MLB) - 1 game 21-Sep
- Luis Almanzar (infielder, b. 1999, Dominican Republic)
- 2017: Tri-City Dust Devils, Northwest League (short-season) - 2 games 4-Aug 5-Aug
- 2021: Fort Wayne TinCaps, High-A Central - 1 game 18-Sep
- Michael Almanzar (infielder, b. 1990, Dominican Republic)
- 2009: Lowell Spinners, New York-Penn League (short-season) - 2 games 5-Aug 9-Sep
- 2016: Norfolk Tides, International League (AAA) - 2 games 30-May 21-Aug
- 2018: Syracuse Chiefs, International League (AAA) - 1 game 2-May
- Richard Almanzar (infielder, b. 1976, Dominican Republic)
- 1998: Toledo Mud Hens, International League (AAA) - 1 game 14-Aug
- Yosvany Almario (outfielder, b. 1980, Cuba)
- 2008: Yuma Scorpions, Golden League (independent) - 1 game 30-Jul
- Adrian Almeida (pitcher, b. 1995, Venezuela)
- 2019: Mobile BayBears, Southern League (AA) - 1 game 28-Jul
- 2021: Venezuela, Americas Olympic Qualifier - 1 game 1-Jun
- Brian Almeida (pitcher, b. 1981, Massachusetts)
- 2003: Rome Braves, South Atlantic League (Low-A) - 1 game 19-Jul
- Diogenes Almengo (pitcher, b. 1995, Dominican Republic)
- 2017: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 12-Aug g2
- Luis Almeyda (infielder, b. 2006, New Jersey)
- Zachery Almond (utility, b. 1996, North Carolina)
- 2021: Missoula PaddleHeads, Pioneer League (independent) - 1 game 9-Jul
- Abraham Almonte (outfielder, b. 1989, Dominican Republic)
- 2008: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 18-Aug
- 2012: Trenton Thunder, Eastern League (AA) - 1 game 5-Apr
- 2015: Cleveland Indians, Major League Baseball - 2 games 20-Aug 25-Aug
- 2017: Cleveland Indians, Major League Baseball - 1 game 2-Sep
- 2021: Atlanta Braves, Major League Baseball - 1 game 30-Jun
- 2022: Boston Red Sox, Major League Baseball - 1 game 2-Oct
- Ariel Almonte (outfielder, b. 2003, Dominican Republic)
- Edwin Almonte (pitcher, b. 1976, Dominican Republic)
- 2003: New York Mets, Major League Baseball - 1 game 20-Jul
- 2007: Newark Bears, Atlantic League (independent) - 1 game 9-Jun
- 2008: Newark Bears, Atlantic League (independent) - 1 game 24-Aug
- Erick Almonte (infielder, b. 1978, Dominican Republic)
- 1998: Greensboro Bats, South Atlantic League (Low-A) - 1 game 29-Aug
- 2008: Toledo Mud Hens, International League (AAA) - 1 game 30-Aug
- 2009: Nashville Sounds, Pacific Coast League (AAA) - 1 game 24-Aug
- Gaby Almonte (pitcher, b. 1992, Dominican Republic)
- 2016: Columbia Fireflies, South Atlantic League (Low-A) - 1 game 2-Jul
- Hector Almonte (pitcher, b. 1975, Dominican Republic)
- 2003: Montreal Expos, Major League Baseball - 1 game 6-Sep
- 2006: Somerset Patriots, Atlantic League (independent) - 1 game 16-Aug
- 2007: Somerset Patriots, Atlantic League (independent) - 2 games 21-Sep 23-Sep
- Jose Almonte (outfielder, b. 1996, Dominican Republic)
- 2019: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 30-Apr
- Josh Almonte (outfielder, b. 1994, New York)
- 2014: Bluefield Blue Jays, Appalachian League (rookie) - 1 game 19-Aug
- 2017: Dunedin Blue Jays, Florida State League (High-A) - 1 game 28-May
- Max Almonte (pitcher, b. 1992, New York)
- 2016: State College Spikes, New York-Penn League (short-season) - 1 game 11-Sep
- Miguel Almonte (pitcher, b. 1993, Dominican Republic)
- 2018: Salt Lake Bees, Pacific Coast League (AAA) - 2 games 7-Aug 9-Aug
- Sandy Almonte (infielder, b. 1982, Dominican Republic)
- 2002: Casper Rockies, Pioneer League (rookie) - 1 game 3-Aug
- 2006: Schaumburg Flyers, Northern League (independent) - 1 game 5-Aug
- Sebastian Almonte (infielder, b. 1999, Dominican Republic)
- 2022: Daytona Tortugas, Florida State League (Low-A) - 1 game 15-Apr
- Wady Almonte (outfielder, b. 1975, Dominican Republic)
- Wilmer Almonte (pitcher, b. 1989, Dominican Republic)
- 2010: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 5-Sep
- Yohan Almonte (pitcher, b. 1989, Dominican Republic)
- 2010: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 14-Sep
- Zoilo Almonte (outfielder, b. 1989, Dominican Republic)
- 2009: Staten Island Yankees, New York-Penn League (short-season) - 3 games 20-Jul 9-Sep 14-Sep
- 2011: Trenton Thunder, Eastern League (AA) - 1 game 3-Aug
- 2012: Trenton Thunder, Eastern League (AA) - 3 games 5-Apr 4-Jul 15-Sep
- 2013: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 24-Apr
- 2013: Trenton Thunder, Eastern League (AA) - 1 game 5-Sep
- 2014: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 1-Sep
- Albert Almora (outfielder, b. 1994, Florida)
- 2015: Tennessee Smokies, Southern League (AA) - 1 game 28-Jul
- 2018: Chicago Cubs, Major League Baseball - 2 games 30-Mar 4-Aug
- 2021: New York Mets, Major League Baseball - 1 game 30-Jun
- Roberto Alomar (infielder, b. 1968, Puerto Rico)
- Sandy Alomar (infielder, b. 1943, Puerto Rico)
- 1976: New York Yankees, American League (MLB) - 1 game 9-Jul
- Sandy Alomar (catcher, b. 1966, Puerto Rico)
- 1990: Cleveland Indians, American League (MLB) - 1 game 13-Aug
- 1993: Cleveland Indians, American League (MLB) - 3 games 3-Sep 4-Sep 11-Sep
- 1994: Cleveland Indians, American League (MLB) - 2 games 29-Jul 31-Jul
- 1997: Cleveland Indians, American League (MLB) - 1 game 27-Aug
- 2007: New York Mets, Major League Baseball - 1 game 11-Sep
- Doug Alongi (outfielder, b. 1970)
- 1993: Geneva Cubs, New York-Penn League (short-season) - 1 game 5-Sep
- Carlos Alonso (infielder, b. 1988, California)
- 2010: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 29-Jul
- 2011: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 24-Jul
- Lazaro Alonso (first baseman, b. 1994, Cuba)
- 2018: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 30-May
- 2019: Jupiter Hammerheads, Florida State League (High-A) - 3 games 15-May g1 15-May g2 22-Aug
- 2021: Pensacola Blue Wahoos, Double-A South - 1 game 12-May
- Pete Alonso (first baseman, b. 1994, Florida)
- Yonder Alonso (first base/outfield, b. 1987, Cuba)
- 2011: Cincinnati Reds, Major League Baseball - 1 game 26-Sep
- 2012: San Diego Padres, Major League Baseball - 1 game 13-Aug
- 2014: El Paso Chihuahuas, Pacific Coast League (AAA) - 1 game 25-Jul
- 2017: Oakland Athletics, Major League Baseball - 1 game 2-Aug
- 2017: Seattle Mariners, Major League Baseball - 1 game 22-Aug
- 2018: Cleveland Indians, Major League Baseball - 1 game 20-Sep
- 2019: Chicago White Sox, Major League Baseball - 1 game 1-Jun
- 2019: Albuquerque Isotopes, Pacific Coast League (AAA) - 1 game 12-Jul
- Eric Alonzo (pitcher, b. 1991, Georgia)
- 2014: AZL Angels, Arizona League (rookie) - 1 game 20-Jul
- 2015: Burlington Bees, Midwest League (Low-A) - 1 game 28-Aug
- Felix Alonzo (pitcher, b. 1999, Dominican Republic)
- 2019: GCL Yankees West, Gulf Coast League (rookie) - 1 game 27-Aug
- Felipe Alou (first base/outfield, b. 1935, Dominican Republic)
- 1967: Atlanta Braves, National League (MLB) - 1 game 9-Jul
- Jesus Alou (outfielder, b. 1942, Dominican Republic)
- 1968: San Francisco Giants, National League (MLB) - 1 game 16-Jun
- Matty Alou (first base/outfield, b. 1938, Dominican Republic)
- 1968: Pittsburgh Pirates, National League (MLB) - 1 game 15-Sep
- 1969: Pittsburgh Pirates, National League (MLB) - 1 game 29-Jun
- 1972: St. Louis Cardinals, National League (MLB) - 2 games 25-Jun g1 25-Jun g2
- Moises Alou (outfielder, b. 1966, Georgia)
- 1992: Montreal Expos, National League (MLB) - 2 games 5-Sep 20-Sep
- 1996: Montreal Expos, National League (MLB) - 1 game 28-Jun
- 1997: Florida Marlins, National League (MLB) - 1 game 27-Sep
- 1998: Houston Astros, National League (MLB) - 1 game 6-Sep
- 2000: Houston Astros, Major League Baseball - 1 game 22-Aug
- 2001: Houston Astros, Major League Baseball - 1 game 27-Jul
- 2004: Chicago Cubs, Major League Baseball - 1 game 24-Sep
- 2007: New York Mets, Major League Baseball - 5 games 23-Apr 27-Aug 11-Sep 16-Sep 26-Sep
- Jason Alstead (outfielder, b. 1968)
- 1993: Bowie Baysox, Eastern League (AA) - 1 game 9-Aug
- Garvin Alston (pitcher, b. 1971, New York)
- 1995: New Haven Ravens, Eastern League (AA) - 3 games 4-Jul 27-Aug 9-Sep
- 1998: Colorado Springs Sky Sox, Pacific Coast League (AAA) - 1 game 21-Aug g2
- Ramiro Altagracia (outfielder, b. 2004, Dominican Republic)
- 2024: FCL Yankees, Florida Complex League (rookie) - 1 game 17-May
- Dan Altavilla (pitcher, b. 1982, Pennsylvania)
- 2017: Seattle Mariners, Major League Baseball - 1 game 22-Aug
- Nick Altermatt (pitcher, b. 1999, Minnesota)
- 2024: Winston-Salem Dash, South Atlantic League (High-A) - 1 game 9-Aug
- Aaron Altherr (outfielder, b. 1991, Arizona)
- 2010: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 29-Jul
- 2011: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 25-May
- 2012: Lakewood BlueClaws, South Atlantic League (Low-A) - 2 games 11-Jul 21-Aug
- 2015: Reading Fightin Phils, Eastern League (AA) - 1 game 17-Jun
- 2015: Lehigh Valley IronPigs, International League (AAA) - 1 game 4-Jul
- 2015: Philadelphia Phillies, Major League Baseball - 1 game 30-Sep
- 2016: Philadelphia Phillies, Major League Baseball - 2 games 25-Sep 2-Oct
- 2017: Philadelphia Phillies, Major League Baseball - 1 game 1-Oct
- 2018: Philadelphia Phillies, Major League Baseball - 3 games 14-Jun 9-Jul g1 9-Jul g2
- 2018: Lehigh Valley IronPigs, International League (AAA) - 1 game 1-Aug g2
- Heath Altman (pitcher, b. 1971, North Carolina)
- 2000: New Jersey Jackals, Northeast League (independent) - 1 game 4-Jul
- Josh Altmann (utility, b. 1994, Illinois)
- 2016: Hickory Crawdads, South Atlantic League (Low-A) - 2 games 18-Aug 22-Aug
- 2018: Down East Wood Ducks, Carolina League (High-A) - 1 game 1-Sep
- Matt Alton (catcher, b. 1990, California)
- 2014: Douglas Diablos, Pecos League (independent) - 1 game 19-Jul
- Jose Altuve (infielder, b. 1990, Venezuela)
- 2012: Houston Astros, Major League Baseball - 1 game 29-Jul
- 2015: Houston Astros, Major League Baseball - 1 game 25-May
- 2016: Houston Astros, Major League Baseball - 1 game 20-Aug
- 2017: Houston Astros, Major League Baseball - 1 game 18-Oct
- 2018: Houston Astros, Major League Baseball - 1 game 29-Sep g2
- 2019: Houston Astros, Major League Baseball - 2 games 28-Mar 19-Jul
- 2021: Houston Astros, Major League Baseball - 2 games 2-May 14-Sep
- 2022: Houston Astros, Major League Baseball - 3 games 19-Sep 20-Sep 21-Sep
- 2024: Houston Astros, Major League Baseball - 1 game 12-Aug
- Jake Alu (utility, b. 1997, New Jersey)
- 2022: Rochester Red Wings, International League (AAA) - 1 game 27-Sep
- 2023: Washington Nationals, Major League Baseball - 1 game 6-Sep
- Andre Alvarado (infielder, b. 1984)
- 2008: Reno Silver Sox, Golden League (independent) - 1 game 31-Jul
- Basilio Alvarado (catcher, b. 1974, Dominican Republic)
- 1996: Vermont Expos, New York-Penn League (short-season) - 1 game 7-Jul
- Carlos (Giancarlo) Alvarado (pitcher, b. 1978, Puerto Rico)
- 1999: Lynchburg Hillcats, Carolina League (High-A) - 1 game 13-Aug
- 2005: Newark Bears, Atlantic League (independent) - 1 game 10-Jul
- Carlos Alvarado (pitcher, b. 1989, Venezuela)
- 2016: Richmond Flying Squirrels, Eastern League (AA) - 1 game 21-Aug
- Darwin Alvarado (outfielder, b. 1998, Venezuela)
- 2018: Connecticut Tigers, New York-Penn League (short-season) - 1 game 27-Jul
- 2019: GCL Tigers East, Gulf Coast League (rookie) - 2 games 10-Aug 19-Aug
- Jake Alu (infielder, b. 1997, New Jersey)
- 2022: Rochester Red Wings, International League (AAA) - 1 game 27-Sep
- Jesus Alvarado (outfielder, b. 2003, Venezuela)
- 2022: FCL Orioles, Florida Complex League (rookie) - 1 game 1-Aug
- Joel Alvarado (catcher, b. 1980, Puerto Rico)
- 2004: Huntsville Stars, Southern League (AA) - 1 game 4-Jul
- Jose Alvarado (pitcher, b. 1995, Venezuela)
- 2017: Tampa Bay Rays, Major League Baseball - 1 game 24-Sep
- 2019: Tampa Bay Rays, Major League Baseball - 3 games 3-Apr 21-Apr 19-Aug
- 2021: Philadelphia Phillies, Major League Baseball - 2 games 29-May 9-Sep
- 2022: Philadelphia Phillies, Major League Baseball - 1 game 25-Sep
- 2024: Philadelphia Phillies, Major League Baseball - 1 game 19-Sep
- Oscar Alvarado (catcher, b. 1980, Venezuela)
- 2001: Pittsfield Astros, New York-Penn League (short-season) - 1 game 26-Aug
- Wilgenis Alvarado (pitcher, b. 2000, Venezuela)
- 2021: Dunedin Blue Jays, Low-A Southeast - 1 game 20-Jun
- 2022: Dunedin Blue Jays, Florida State League (Low-A) - 3 games 27-Apr 2-Jun 29-Jul
- Abe Alvarez (pitcher, b. 1982, California)
- 2008: Long Island Ducks, Atlantic League (independent) - 1 game 24-Aug
- Alex Alvarez (catcher, b. 1996, Venezuela)
- 2016: GCL Rays, Gulf Coast League (rookie) - 1 game 26-Aug
- 2018: Bowling Green Hot Rods, Midwest League (Low-A) - 1 game 27-Aug
- 2022: Washington Wild Things, Frontier League (independent) - 1 game 13-Jul
- Armando Alvarez (infielder, b. 1994, Florida)
- 2023: Sacramento RiverCats, Pacific Coast League (AAA) - 1 game 9-Aug
- Andres Alvarez (infielder, b. 1997, California)
- 2019: GCL Pirates, Gulf Coast League (rookie) - 2 games 3-Aug 24-Aug g1
- 2021: Greensboro Grasshoppers, High-A East - 1 game 1-Jul
- Antonio Alvarez (infielder, b. 1992, New Jersey)
- 2013: Missoula Osprey, Pioneer League (rookie) - 1 game 19-Aug
- 2014: Bisbee Blue, Pecos League (independent) - 1 game 19-Jul
- Asdrubal Alvarez (infielder, b. 1999, Venezuela)
- Basilio Alvarez (pitcher, b. 1984, Dominican Republic)
- 2006: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 18-Jul
- Clemente Alvarez (catcher, b. 1968, Venezuela)
- 1990: South Bend White Sox, Midwest League (Low-A) - 1 game 14-Aug
- 1999: Reading Phillies, Eastern League (AA) - 1 game 6-Sep
- Daniel Alvarez (pitcher, b. 1996, Venezuela)
- 2018: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 30-Aug
- Dariel Alvarez (outfielder, b. 1988, Cuba)
- 2016: Norfolk Tides, International League (AAA) - 2 games 30-May 21-Aug
- Dario Alvarez (pitcher, b. 1989, Dominican Republic)
- 2013: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 14-Aug
- 2014: Scottsdale Scorpions, Arizona Fall League - 1 game 9-Oct
- 2015: New York Mets, Major League Baseball - 1 game 30-Sep
- 2021: Dominican Republic, Americas Olympic Qualifier - 1 game 2-Jun
- Eddy Alvarez (infielder, b. 1990, Florida)
- 2021: Miami Marlins, Major League Baseball - 4 games 24-Sep 25-Sep 26-Sep 30-Sep
- 2023: Nashville Sounds, International League (AAA) - 1 game 19-Apr
- 2024: New York Mets, Major League Baseball - 1 game 19-Sep
- Edilson Alvarez (pitcher, b. 1988, Dominican Republic)
- 2014: Trois-Rivieres Aigles, Can-Am League (independent) - 1 game 26-Jul
- 2015: Trois-Rivieres Aigles, Can-Am League (independent) - 2 games 11-Aug 19-Sep
- 2016: Trois-Rivieres Aigles, Can-Am League (independent) - 2 games 27-May 9-Aug
- Francisco Alvarez (catcher, b. 2001, Venezuela)
- Gabe Alvarez (infielder, b. 1974, Mexico)
- 1999: Detroit Tigers, American League (MLB) - 1 game 24-Jul
- Gerardo Alvarez (infielder, b. 1979, California)
- 2008: Somerset Patriots, Atlantic League (independent) - 1 game 20-Jul
- Hector Alvarez (catcher, b. 1991, Venezuela)
- 2012: Bluefield Blue Jays, Appalachian League (rookie) - 1 game 18-Aug
- Henderson Alvarez (pitcher, b. 1990, Venezuela)
- 2014: Miami Marlins, Major League Baseball - 1 game 17-Sep
- Ignacio Alvarez (infielder, b. 2003, California)
- 2022: FCL Braves, Florida Complex League (rookie) - 1 game 13-Aug
- Jhon Alvarez (catcher, b. 1996, Venezuela)
- 2016: GCL Twins, Gulf Coast League (rookie) - 1 game 27-Aug
- Jimmy Alvarez (infielder, b. 1977, Dominican Republic)
- 1999: Quad City River Bandits, Midwest League (Low-A) - 1 game 4-Sep
- Jorge Alvarez (utility, b. 1967, Dominican Republic)
- 1999: Somerset Patriots, Atlantic League (independent) - 2 games 11-Sep g1 11-Sep g2
- 2005: San Angelo Colts, Central League (independent) - 2 games 16-Aug 3-Sep
- 2007: El Paso Diablos, American Association (independent) - 1 game 12-Aug
- Jose Alvarez (pitcher, b. 1989, Venezuela)
- 2017: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 21-Jun
- Juan Alvarez (pitcher, b. 1973, Florida)
- 1999: Edmonton Trappers, Pacific Coast League (AAA) - 1 game 4-Jul
- Mandy Alvarez (infielder, b. 1994, Florida)
- 2016: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 3-Sep
- 2018: Trenton Thunder, Eastern League (AA) - 2 games 20-Jun 25-Jul
- Matt Alvarez (pitcher, b. 1991, New Jersey)
- 2015: Wilmington Blue Rocks, Carolina League (High-A) - 1 game 23-May
- 2016: New Jersey Jackals, Can-Am League (independent) - 1 game 9-Sep
- Miguel Alvarez (outfielder, b. 1989, Dominican Republic)
- 2010: Williamsport Crosscutters, New York-Penn League (short-season) - 2 games 29-Jul 9-Aug
- Nelson Alvarez (pitcher, b. 1998, Florida)
- 2022: Mesa Solar Sox, Arizona Fall League - 1 game 15-Oct
- Pedro Alvarez (infielder, b. 1987, Dominican Republic)
- 2010: Pittsburgh Pirates, Major League Baseball - 1 game 15-Sep
- 2012: Pittsburgh Pirates, Major League Baseball - 2 games 29-Jul 25-Sep
- 2013: Pittsburgh Pirates, Major League Baseball - 1 game 1-Sep
- 2016: Baltimore Orioles, Major League Baseball - 2 games 20-Aug 1-Oct
- 2017: Baltimore Orioles, Major League Baseball - 1 game 24-Sep
- Rafael Alvarez (outfielder, b. 1977, Venezuela)
- 2001: Fargo-Moorhead RedHawks, Northern League (independent) - 1 game 29-Jul
- 2002: Elmira Pioneers, Northeast League (independent) - 3 games 1-Sep 4-Sep 5-Sep
- 2004: Pensacola Pelicans, Central League (independent) - 1 game 3-Jul
- 2006: Altoona Curve, Eastern League (AA) - 1 game 14-Apr
- 2010: Lincoln Saltdogs, American Association (independent) - 2 games 21-Aug 24-Aug g2
- Renyel Alvarez (outfielder, b. 1978, Cuba)
- Roberto Alvarez (outfielder, b. 1983, Cuba)
- 2010: Lincoln Saltdogs, American Association (independent) - 1 game 24-Aug g2
- Roberto Alvarez (catcher, b. 1999, Venezuela)
- 2019: Bowling Green Hot Rods, Midwest League (Low-A) - 1 game 30-May
- 2023: Durham Bulls, International League (AAA) - 1 game 6-Jun
- Tavo Alvarez (pitcher, b. 1971, Mexico)
- 1992: Harrisburg Senators, Eastern League (AA) - 1 game 7-Aug
- 1997: Ottawa Lynx, International League (AAA) - 1 game 2-Aug
- Tony Alvarez (outfielder, b. 1979, Venezuela)
- 1999: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 30-Jul
- 2002: Altoona Curve, Eastern League (AA) - 1 game 8-May
- Wilson Alvarez (pitcher, b. 1970, Venezuela)
- 1997: San Francisco Giants, National League (MLB) - 1 game 31-Aug
- 2001: Orlando Rays, Southern League (AA) - 1 game 8-Aug
- Yordan Alvarez (first base/outfield, b. 1997, Cuba)
- 2018: Fresno Grizzlies, Pacific Coast League (AAA) - 1 game 13-Aug
- 2019: Houston Astros, Major League Baseball - 1 game 19-Jul
- 2021: Houston Astros, Major League Baseball - 2 games 2-May 14-Sep
- 2022: Houston Astros, Major League Baseball - 2 games 19-Sep 21-Sep
- 2024: Houston Astros, Major League Baseball - 1 game 12-Aug
- Yorkislandy Alvarez (infielder, b. 1999, Cuba)
- Billy Alvino (catcher, b. 1987, New York)
- 2011: Newark Bears, Can-Am League (independent) - 3 games 4-Jul 3-Aug 30-Aug
- 2012: Newark Bears, Can-Am League (independent) - 2 games 18-Jun 7-Jul
- 2012: Rockland Boulders, Can-Am League (independent) - 3 games 13-Jul 30-Jul g2 26-Aug
- 2013: Rockland Boulders, Can-Am League (independent) - 1 game 11-Aug
- Wander Alvino (pitcher, b. 1987, Dominican Republic)
- 2013: Newark Bears, Can-Am League (independent) - 1 game 9-Aug
- Jerome Alviso (infielder, b. 1975, California)
- 1999: Salem Avalanche, Carolina League (High-A) - 1 game 9-Aug
- Jose Amado (infielder, b. 1975, Venezuela)
- 1996: Lansing Lugnuts, Midwest League (Low-A) - 1 game 13-Aug
- 2003: Bridgeport Bluefish, Atlantic League (independent) - 1 game 3-Aug
- Chris Amador (infielder, b. 1982, Puerto Rico)
- 2001: Kannapolis Intimidators, South Atlantic League (Low-A) - 1 game 2-Aug
- Jerry Amador (outfielder, b. 1980, Puerto Rico)
- 2003: Road Warriors, Atlantic League (independent) - 2 games 12-Sep g1 14-Sep
- Manny Amador (infielder, b. 1975, Dominican Republic)
- 1996: Reading Phillies, Eastern League (AA) - 1 game 5-Apr
- 1997: Reading Phillies, Eastern League (AA) - 2 games 5-Apr 17-Aug
- 1998: Reading Phillies, Eastern League (AA) - 1 game 11-Apr
- Ranser Amador (outfielder, b. 1999, Dominican Republic)
- 2021: Daytona Tortugas, Low-A Southeast - 1 game 26-Jun
- Wilson Amador (outfielder, b. 1996, Dominican Republic)
- 2017: Greeneville Astros, Appalachian League (rookie) - 1 game 26-Aug
- Alex Amalfi (pitcher, b. 2001, Massachusetts)
- 2022: Dunedin Blue Jays, Florida State League (Low-A) - 1 game 9-Sep
- 2023: Dunedin Blue Jays, Florida State League (Low-A) - 3 games 3-Jun 8-Jun 17-Aug
- Beau Amaral (outfielder, b. 1991, California)
- 2013: Dayton Dragons, Midwest League (Low-A) - 1 game 31-Aug
- 2017: Lancaster Barnstormers, Atlantic League (independent) - 1 game 13-Aug
- Daniel Amaral (outfielder, b. 1997, California)
- Juan Amarante (pitcher, b. 2004, Venezuela)
- Alexi Amarista (infielder, b. 1989, Venezuela)
- 2012: San Diego Padres, Major League Baseball - 1 game 13-Aug
- 2018: Lehigh Valley IronPigs, International League (AAA) - 3 games 17-May 27-May 14-Jun
- 2021: Gastonia Honey Hunters, Atlantic League (independent) - 1 game 4-Sep
- Andrew Amaro (outfielder, b. 1993, Pennsylvania)
- 2015: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 12-Aug
- Ruben Amaro (outfielder, b. 1965, Pennsylvania)
- 1992: Philadelphia Phillies, National League (MLB) - 1 game 22-Aug
- 1993: Philadelphia Phillies, National League (MLB) - 3 games 12-Sep 18-Sep 19-Sep
- 1995: Buffalo Bisons, American Association (AAA) - 1 game 17-Aug
- 1996: Philadelphia Phillies, National League (MLB) - 3 games 21-Sep 28-Sep 29-Sep
- 1997: Philadelphia Phillies, National League (MLB) - 3 games 15-Sep g1 15-Sep g2 27-Sep
- 1998: Philadelphia Phillies, National League (MLB) - 1 game 11-Apr
- Gioskar Amaya (infielder, b. 1992, Venezuela)
- 2015: South Bend Cubs, Midwest League (Low-A) - 1 game 26-Aug
- Jacob Amaya (infielder, b. 1998, California)
- 2019: Great Lakes Loons, Midwest League (Low-A) - 1 game 30-May
- 2021: Glendale Desert Dogs, Arizona Fall League - 3 games 18-Oct 20-Oct 21-Oct
- 2023: Jacksonville Jumbo Shrimp, International League (AAA) - 2 games 19-Apr 23-Sep
- Miguel Amaya (catcher/first base, b. 1999, Panama)
- 2017: Eugene Emeralds, Northwest League (short-season) - 1 game 29-Jul
- 2018: South Bend Cubs, Midwest League (Low-A) - 1 game 3-Aug
- 2019: Mesa Solar Sox, Arizona Fall League - 2 games 15-Oct 18-Oct
- 2022: Tennessee Smokies, Southern League (AA) - 1 game 6-Aug
- 2023: Chicago Cubs, Major League Baseball - 1 game 1-Oct
- 2024: Chicago Cubs, Major League Baseball - 1 game 28-Sep
- David Amberson (outfielder, b. 1987, Washington)
- 2016: Trois-Rivieres Aigles, Can-Am League (independent) - 1 game 27-May
- Chip Ambres (outfielder, b. 1979, Texas)
- 1999: Utica Blue Sox, New York-Penn League (short-season) - 1 game 1-Sep
- 2008: San Diego Padres, Major League Baseball - 1 game 21-Sep
- 2009: Buffalo Bisons, International League (AAA) - 1 game 9-Aug
- Hector Ambriz (pitcher, b. 1984, California)
- 2006: Missoula Osprey, Pioneer League (rookie) - 1 game 24-Aug
- John Ambrose (pitcher, b. 1974, Indiana)
- 2000: Arkansas Travelers, Texas League (AA) - 1 game 21-Aug
- Anthony Ambrosini (catcher, b. 1978, New York)
- Dominick Ambrosini (outfield/first base, b. 1981, New York)
- 2003: Brevard County Manatees, Florida State League (High-A) - 3 games 24-Aug g1 27-Aug 29-Aug
- 2005: Long Island Ducks, Atlantic League (independent) - 1 game 17-Sep
- 2007: Lancaster Barnstormers, Atlantic League (independent) - 3 games 9-Jun 26-Aug 13-Sep
- Trey Amburgey (outfielder, b. 1994, Florida)
- Michael Amditis (catcher, b. 1997, Florida)
- 2021: Scottsdale Scorpions, Arizona Fall League - 1 game 18-Oct
- Kyle Amendt (pitcher, b. 2000, Iowa)
- 2024: Salt River Rafters, Arizona Fall League - 1 game 10-Oct
- Gordie Amerson (outfielder, b. 1976, California)
- 1995: Idaho Falls Padres, Pioneer League (rookie) - 1 game 10-Aug
- 1998: Greensboro Bats, South Atlantic League (Low-A) - 1 game 29-Aug
- Jeff Ames (pitcher, b. 1991, Washington)
- 2012: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 9-Sep
- 2017: Durham Bulls, International League (AAA) - 1 game 19-Sep
- Nick Ames (first baseman, b. 1996, Arizona)
- Steven Ames (pitcher, b. 1988, Washington)
- 2011: Chattanooga Lookouts, Southern League (AA) - 1 game 7-Aug
- 2013: New Orleans Zephyrs, Pacific Coast League (AAA) - 1 game 21-Jul
- Alfredo Amezaga (infielder, b. 1978, Mexico)
- 2002: Salt Lake Stingers, Pacific Coast League (AAA) - 1 game 15-Aug
- 2006: Florida Marlins, Major League Baseball - 1 game 30-Jul
- 2008: Florida Marlins, Major League Baseball - 1 game 8-Aug
- 2011: Florida Marlins, Major League Baseball - 1 game 8-Aug
- Adan Amezcua (catcher, b. 1974, Mexico)
- 1995: Quad City River Bandits, Midwest League (Low-A) - 1 game 6-Aug
- Tony Amezcua (pitcher, b. 1991, California)
- 2013: Dayton Dragons, Midwest League (Low-A) - 1 game 31-Aug
- 2015: Sussex County Miners, Can-Am League (independent) - 1 game 18-Aug
- Zak Ammirato (outfielder, b. 1974, California)
- 1996: Utica Blue Sox, New York-Penn League (short-season) - 1 game 6-Jul
- Justin Ammons (outfielder, b. 1998, South Carolina)
- Edwin Amparo (infielder, b. 2004, Dominican Republic)
- A.J. Ampi (pitcher, b. 1978, California)
- 2002: Evansville Otters, Frontier League (independent) - 1 game 27-Jul
- Mike Amrhein (catcher/first base, b. 1975, Illinois)
- 1997: Williamsport Cubs, New York-Penn League (short-season) - 1 game 19-Jul
- 1998: Rockford Cubbies, Midwest League (Low-A) - 1 game 19-Aug
- 2001: West Tenn Diamond Jaxx, Southern League (AA) - 1 game 4-Aug
- Jake Anchia (catcher, b. 1997, Florida)
- 2021: Arkansas Travelers, Double-A Central - 1 game 15-Sep
- Chris Andel (pitcher, b. 1980, Illinois)
- 2004: Gary Southshore RailCats, Northern League (independent) - 1 game 11-Jul
- Larry Andersen (pitcher, b. 1953, Oregon)
- 1993: Philadelphia Phillies, National League (MLB) - 1 game 19-Sep
- 1994: Philadelphia Phillies, National League (MLB) - 1 game 22-Jul g2
- Mark Andersen (pitcher, b. 1979, Oregon)
- 1995: Kane County Cougars, Midwest League (Low-A) - 1 game 6-Aug
- Aidan Anderson (pitcher, b. 1997, Texas)
- 2019: GCL Phillies West, Gulf Coast League (rookie) - 2 games 19-Aug 29-Aug
- 2021: Clearwater Threshers, Low-A Southeast - 2 games 8-May 19-May
- 2022: Clearwater Threshers, Florida State League (Low-A) - 2 games 17-Apr 21-Apr
- 2022: Jersey Shore BlueClaws, South Atlantic League (High-A) - 1 game 4-May
- Antwoine Anderson (pitcher, b. 1978, Ohio)
- 2003: Quebec Les Capitales, Northeast League (independent) - 1 game 28-Jun
- Blake Anderson (catcher, b. 1973, Texas)
- 1997: Asheville Tourists, South Atlantic League (Low-A) - 1 game 14-Aug
- Brady Anderson (outfielder, b. 1964, Maryland)
- 1992: Baltimore Orioles, American League (MLB) - 1 game 21-Aug
- 1995: Baltimore Orioles, American League (MLB) - 1 game 1-Oct
- 1996: Baltimore Orioles, American League (MLB) - 5 games 13-Jul g1 13-Jul g2 18-Sep 19-Sep g1 19-Sep g2
- 1997: Baltimore Orioles, American League (MLB) - 2 games 4-Jul g1 4-Jul g2
- 1998: Baltimore Orioles, American League (MLB) - 1 game 11-Jul
- 2000: Baltimore Orioles, Major League Baseball - 1 game 1-Oct
- 2001: Baltimore Orioles, Major League Baseball - 1 game 2-Sep
- Brandon Anderson (outfielder, b. 1985)
- 2009: Kalamazoo Kings, Frontier League (independent) - 2 games 25-Jul 27-Jul
- Brett Anderson (pitcher, b. 1988, Texas)
- 2009: Oakland Athletics, Major League Baseball - 1 game 14-Aug
- Brian Anderson (catcher, b. 1980, Virginia)
- 2002: Vermont Expos, New York-Penn League (short-season) - 1 game 6-Jul
- Brian Anderson (outfielder, b. 1982, Arizona)
- 2006: Chicago White Sox, Major League Baseball - 1 game 30-Jul
- 2009: Chicago White Sox, Major League Baseball - 1 game 23-Apr
- Brian Anderson (infielder, b. 1993, Oklahoma)
- 2016: Mesa Solar Sox, Arizona Fall League - 1 game 11-Oct
- 2017: New Orleans Baby Cakes, Pacific Coast League (AAA) - 1 game 30-Jul
- 2018: Miami Marlins, Major League Baseball - 2 games 30-Mar 12-Sep
- 2019: Miami Marlins, Major League Baseball - 3 games 1-Apr 4-Jun 4-Aug
- 2021: Miami Marlins, Major League Baseball - 1 game 23-May
- 2022: Miami Marlins, Major League Baseball - 3 games 16-Apr 24-May 29-Sep
- Bryan Anderson (catcher, b. 1986, California)
- 2007: Springfield Cardinals, Texas League (AA) - 1 game 15-Aug
- 2015: Nashville Sounds, Pacific Coast League (AAA) - 1 game 27-Jul
- Chris Anderson (catcher/outfielder, b. 1974, Oklahoma)
- 1996: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 7-Jul
- 1997: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 14-Aug
- Chris Anderson (catcher, b. 1985, California)
- Chris Anderson (pitcher, b. 1986, New Hampshire)
- 2009: Worcester Tornadoes, Can-Am League (independent) - 1 game 1-Sep
- Chase Anderson (pitcher, b. 1987, Texas)
- 2019: Milwaukee Brewers, Major League Baseball - 1 game 4-Jun
- Cole Anderson (outfielder, b. 1997, Colorado)
- 2017: Boise Hawks, Northwest League (short-season) - 2 games 4-Aug 5-Aug
- Dennis Anderson (catcher, b. 1978, Arizona)
- 2003: Jupiter Hammerheads, Florida State League (High-A) - 2 games 26-Aug 29-Aug
- 2006: Sioux Falls Canaries, American Association (independent) - 1 game 6-Aug
- Devin Anderson (pitcher, b. 1984, Florida)
- 2003: GCL Braves, Gulf Coast League (rookie) - 1 game 27-Aug
- Drew Anderson (infielder, b. 1983, Indiana)
- 2009: Charlotte Stone Crabs, Florida State League (High-A) - 1 game 5-Sep
- Drew Anderson (pitcher, b. 1994, Nevada)
- 2018: Philadelphia Phillies, Major League Baseball - 1 game 28-Sep
- Dwain Anderson (infielder, b. 1947, California)
- 1972: St. Louis Cardinals, National League (MLB) - 1 game 25-Jun g1
- Eric Anderson (pitcher, b. 1973)
- 1998: Elmira Pioneers, Northeast League (independent) - 1 game 7-Aug
- Eric Anderson (pitcher, b. 1974, Missouri)
- 2001: Quebec Les Capitales, Northeast League (independent) - 1 game 20-Jul
- Garret Anderson (outfielder, b. 1972, California)
- 1994: Vancouver Canadians, Pacific Coast League (AAA) - 3 games 9-Sep 10-Sep 11-Sep
- 1997: Anaheim Angels, American League (MLB) - 4 games 27-Jul 27-Aug 28-Aug 31-Aug
- 2005: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 10-Jun
- 2009: Atlanta Braves, Major League Baseball - 1 game 21-Sep
- Grant Anderson (pitcher, b. 1997, Texas)
- 2019: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 11-Aug
- 2022: Santurce Cangrejeros, Liga Clemente (winter) - 1 game 3-Dec
- 2023: Texas Rangers, Major League Baseball - 1 game 5-Jun
- Ian Anderson (pitcher, b. 1998, New York)
- 2020: Atlanta Braves, Major League Baseball - 1 game 13-Oct
- Isaac Anderson (pitcher, b. 1993, Idaho)
- 2018: Rancho Cucamonga Quakes, California League (High-A) - 1 game 12-Aug
- Jack Anderson (pitcher, b. 1994, Illinois)
- 2021: Arkansas Travelers, Double-A Central - 1 game 22-Jul
- Jack Anderson (pitcher, b. 1999, Florida)
- 2022: Lakeland Flying Tigers, Florida State League (Low-A) - 2 games 19-May 1-Jul
- 2022: Salt River Rafters, Arizona Fall League - 1 game 13-Oct
- Jacob Anderson (outfielder, b. 1992, California)
- 2012: Bluefield Blue Jays, Appalachian League (rookie) - 1 game 18-Aug
- Jason Anderson (pitcher, b. 1976, Virginia)
- 2000: Visalia Oaks, California League (High-A) - 1 game 2-Sep
- Jason Anderson (pitcher, b. 1979, Illinois)
- 2009: Lehigh Valley IronPigs, International League (AAA) - 1 game 12-Apr
- 2010: Reading Phillies, Eastern League (AA) - 1 game 11-May
- Jeff Anderson (infielder, b. 1973, Ohio)
- 1997: Catskill Cougars, Northeast League (independent) - 1 game 3-Aug
- 2001: Somerset Patriots, Atlantic League (independent) - 1 game 1-Jul
- Jimmy Anderson (pitcher, b. 1976, Virginia)
- 1998: Nashville Sounds, Pacific Coast League (AAA) - 1 game 28-Aug
- 1999: Pittsburgh Pirates, National League (MLB) - 1 game 2-Oct
- Jimmy Anderson (catcher, b. 1981, California)
- 2002: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 30-Aug g1 30-Aug g2
- John Anderson (utility, b. 1977, Minnesota)
- Jordan Anderson (outfielder, b. 1994, Tennessee)
- 2021: Salina Stockade, Pecos League (independent) - 1 game 21-Jul
- Josh Anderson (outfielder, b. 1982, Kentucky)
- 2005: Corpus Christi Hooks, Texas League (AA) - 1 game 4-Sep
- 2009: Kansas City Royals, Major League Baseball - 1 game 28-Sep
- Keith Anderson (catcher, b. 1979, California)
- 2004: San Jose Giants, California League (High-A) - 1 game 17-Aug
- Keto Anderson (outfielder, b. 1979, Alabama)
- 2005: New Haven County Cutters, Can-Am League (independent) - 2 games 25-Jun 3-Jul
- Kyle Anderson (pitcher, b. 1990, Washington)
- 2013: Vancouver Canadians, Northwest League (short-season) - 1 game 20-Aug
- Lars Anderson (first baseman, b. 1987, California)
- 2008: Portland Sea Dogs, Eastern League (AA) - 2 games 4-Aug 3-Sep
- 2010: Pawtucket Red Sox, International League (AAA) - 1 game 29-May
- 2011: Pawtucket Red Sox, International League (AAA) - 2 games 1-Aug 20-Aug
- 2015: Tulsa Drillers, Texas League (AA) - 1 game 30-Jul
- Leslie Anderson (first base/outfield, b. 1982, Cuba)
- 2011: Durham Bulls, International League (AAA) - 1 game 5-Aug
- 2013: Durham Bulls, International League (AAA) - 1 game 17-Sep
- Marlon Anderson (infielder, b. 1974, Alabama)
- 1995: Batavia Clippers, New York-Penn League (short-season) - 1 game 20-Aug
- 1997: Reading Phillies, Eastern League (AA) - 4 games 5-Apr 29-Jun 20-Jul 17-Aug
- 1998: Scranton/Wilkes-Barre Red Barons, International League (AAA) - 1 game 14-Aug
- 1998: Philadelphia Phillies, National League (MLB) - 2 games 13-Sep 20-Sep
- 1999: Philadelphia Phillies, National League (MLB) - 3 games 17-Sep 26-Sep 3-Oct
- 2000: Scranton/Wilkes-Barre Red Barons, International League (AAA) - 2 games 8-Jul 23-Jul
- 2000: Philadelphia Phillies, Major League Baseball - 3 games 11-Sep g1 11-Sep g2 24-Sep
- 2001: Philadelphia Phillies, Major League Baseball - 1 game 3-Sep
- 2002: Philadelphia Phillies, Major League Baseball - 1 game 7-Sep
- 2004: St. Louis Cardinals, Major League Baseball - 1 game 25-Jul
- 2005: New York Mets, Major League Baseball - 7 games 10-Jun 4-Jul 3-Aug 14-Sep 17-Sep 28-Sep 2-Oct
- 2007: New York Mets, Major League Baseball - 2 games 11-Sep 26-Sep
- 2008: New York Mets, Major League Baseball - 1 game 6-Jul
- Marty Anderson (pitcher, b. 1993, Georgia)
- 2017: Columbia Fireflies, South Atlantic League (Low-A) - 1 game 23-Aug
- Matt Anderson (pitcher, b. 1976, Kentucky)
- 1999: Detroit Tigers, American League (MLB) - 1 game 11-Apr
- 2000: Detroit Tigers, Major League Baseball - 1 game 22-Jul day
- Matt Anderson (infielder, b. 1982, California)
- 2005: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 26-Aug g1 26-Aug g2
- 2006: Hagerstown Suns, South Atlantic League (Low-A) - 2 games 26-Apr 15-Aug
- Matt Anderson (pitcher, b. 1991, Colorado)
- 2015: Jackson Generals, Southern League (AA) - 1 game 29-Jul
- Max Anderson (infielder, b. 2002, Missouri)
- Melvin Anderson (outfielder, b. 1979, Louisiana)
- 2001: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 13-Apr
- Mike Anderson (outfielder, b. 1951, South Carolina)
- 1971: Philadelphia Phillies, National League (MLB) - 1 game 12-Sep
- Mike Anderson (pitcher, b. 1988, New York)
- 2011: New York Federals, Can-Am League (independent) - 1 game 22-Jul
- Milt Anderson (outfielder, b. 1972, Georgia)
- 1996: Columbus RedStixx, South Atlantic League (Low-A) - 1 game 30-Aug
- Nick Anderson (pitcher, b. 1990, Minnesota)
- 2015: Cedar Rapids Kernels, Midwest League (Low-A) - 1 game 29-Aug g2
- 2019: Miami Marlins, Major League Baseball - 1 game 1-Apr
- 2019: Tampa Bay Rays, Major League Baseball - 2 games 19-Aug 3-Sep g2
- 2021: Tampa Bay Rays, Major League Baseball - 2 games 21-Sep 26-Sep
- 2023: Atlanta Braves, Major League Baseball - 1 game 7-Jun
- Nick Anderson (outfielder, b. 1997, Texas)
- 2021: Fort Myers Mighty Mussels, Low-A Southeast - 2 games 27-Jul 29-Jul g2
- Richie Anderson (pitcher, b. 1991)
- 2014: Taos Blizzard, Pecos League (independent) - 1 game 21-Jul
- Ryan Anderson (outfielder, b. 1995, California)
- 2019: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 11-Aug
- Ryan Anderson (pitcher, b. 1998, Nevada)
- 2021: Tampa Tarpons, Low-A Southeast - 1 game 10-Jun
- 2022: Tampa Tarpons, Florida State League (Low-A) - 3 games 19-Apr 26-Aug 28-Aug
- Shaun Anderson (pitcher, b. 1994, Florida)
- 2018: Richmond Flying Squirrels, Eastern League (AA) - 1 game 4-Jun
- Tanner Anderson (pitcher, b. 1993, Florida)
- 2016: Bradenton Marauders, Florida State League (High-A) - 1 game 30-Aug
- 2016: Surprise Saguaros, Arizona Fall League - 1 game 12-Oct
- Thomas Anderson (pitcher, b. 1969)
- 1993: Jackson Generals, Texas League (AA) - 1 game 14-Aug
- Tim Anderson (infielder, b. 1993, Alabama)
- 2014: Glendale Desert Dogs, Arizona Fall League - 1 game 9-Oct
- 2018: Chicago White Sox, Major League Baseball - 1 game 20-Sep
- 2019: Chicago White Sox, Major League Baseball - 1 game 1-Jun
- 2021: Chicago White Sox, Major League Baseball - 2 games 5-Jul 3-Oct
- 2024: Miami Marlins, Major League Baseball - 1 game 4-Jun
- Travis Anderson (catcher, b. 1979, California)
- Tyler Anderson (pitcher, b. 1993)
- 2019: Lincoln Saltdogs, American Association (independent) - 2 games 31-May 16-Jul
- Wes Anderson (pitcher, b. 1979, Arkansas)
- 1999: Kane County Cougars, Midwest League (Low-A) - 1 game 5-Sep
- Robert Andino (infielder, b. 1984, Florida)
- 2009: Baltimore Orioles, Major League Baseball - 1 game 4-Oct
- 2010: Norfolk Tides, International League (AAA) - 1 game 29-May
- 2011: Baltimore Orioles, Major League Baseball - 1 game 28-Aug day
- 2012: Baltimore Orioles, Major League Baseball - 1 game 31-Jul
- 2013: Indianapolis Indians, International League (AAA) - 1 game 30-Aug
- 2014: Indianapolis Indians, International League (AAA) - 1 game 25-May
- 2015: Somerset Patriots, Atlantic League (independent) - 5 games 13-Aug 17-Aug 25-Sep 26-Sep 27-Sep
- Jeff Andra (pitcher, b. 1975, Kansas)
- 2002: Elmira Pioneers, Northeast League (independent) - 1 game 5-Sep
- Fabian Andrade (first base/outfield, b. 1999, Venezuela)
- Greifer Andrade (outfielder, b. 1997, Venezuela)
- 2017: Everett AquaSox, Northwest League (short-season) - 1 game 3-Aug
- Jancy Andrade (pitcher, b. 1978, Venezuela)
- 1999: Delmarva Shorebirds, South Atlantic League (Low-A) - 1 game 10-Aug
- Kleyderve Andrade (pitcher, b. 2002, Venezuela)
- Pete Andrelczyk (pitcher, b. 1985, Pennsylvania)
- 2014: Lancaster Barnstormers, Atlantic League (independent) - 1 game 27-Sep
- John Andreoli (outfielder, b. 1990, Massachusetts)
- 2017: Iowa Cubs, Pacific Coast League (AAA) - 1 game 21-Aug
- 2018: Tacoma Rainiers, Pacific Coast League (AAA) - 1 game 9-Aug
- 2018: Baltimore Orioles, Major League Baseball - 2 games 29-Sep g1 29-Sep g2
- 2019: Tacoma Rainiers, Pacific Coast League (AAA) - 2 games 1-Sep 2-Sep
- Alex Andreopoulos (catcher, b. 1972, Ontario)
- 1998: El Paso Diablos, Texas League (AA) - 1 game 22-Aug
- 2000: Aberdeen Arsenal, Atlantic League (independent) - 2 games 6-Jul 14-Sep
- Merfy Andrew (pitcher, b. 1996, Dominican Republic)
- 2021: FCL Red Sox, Florida Complex League (rookie) - 1 game 23-Aug g2
- Aaron Andrews (pitcher, b. unknown)
- 2021: Salina Stockade, Pecos League (independent) - 1 game 21-Jul
- Bobby Andrews (outfielder, b. 1983, Philippines)
- 2005: Aberdeen IronBirds, New York-Penn League (short-season) - 1 game 7-Sep
- Clayton Andrews (pitcher, b. 1978, Florida)
- 2004: Bangor Lumberjacks, Northeast League (independent) - 1 game 10-Sep
- Clayton Andrews (pitcher/outfielder, b. 1997, California)
- 2019: Biloxi Shuckers, Southern League (AA) - 2 games 10-Sep 11-Sep
- 2019: Glendale Desert Dogs, Arizona Fall League - 1 game 15-Oct
- 2023: Nashville Sounds, International League (AAA) - 2 games 19-Apr 23-Sep
- Greg Andrews (infielder, b. 1981, Illinois)
- 2007: Gateway Grizzlies, Frontier League (independent) - 1 game 7-Aug
- Shane Andrews (infielder, b. 1971, Texas)
- 1993: Harrisburg Senators, Eastern League (AA) - 2 games 29-Aug 5-Sep
- 1996: Montreal Expos, National League (MLB) - 1 game 28-Jun
- 1998: Montreal Expos, National League (MLB) - 4 games 9-Jul 18-Jul 20-Sep 23-Sep
- 2000: Chicago Cubs, Major League Baseball - 1 game 2-Sep
- 2003: Rochester Red Wings, International League (AAA) - 1 game 15-Aug
- Jon Andrianoff (infielder, b. 1981, New York)
- 2001: Pittsfield Astros, New York-Penn League (short-season) - 2 games 19-Jul 21-Jul
- Matt Andriese (pitcher, b. 1989, California)
- 2016: Tampa Bay Rays, Major League Baseball - 1 game 13-Aug
- 2019: Arizona Diamondbacks, Major League Baseball - 1 game 17-Jul
- 2024: Jacksonville Jumbo Shrimp, International League (AAA) - 1 game 19-Jun
- Todd Androsko (pitcher, b. 1984, Florida)
- 2007: Pensacola Pelicans, American Association (independent) - 1 game 12-Aug
- Connor Andrus (catcher, b. 1993)
- 2015: Fargo-Moorhead RedHawks, American Association (independent) - 1 game 15-Jul
- Elvis Andrus (infielder, b. 1988, Venezuela)
- 2008: Frisco Roughriders, Texas League (AA) - 1 game 11-Aug
- 2015: Texas Rangers, Major League Baseball - 1 game 22-May
- 2019: Texas Rangers, Major League Baseball - 2 games 17-Jul 19-Jul
- 2021: Oakland Athletics, Major League Baseball - 2 games 29-Apr 16-Sep
- 2022: Oakland Athletics, Major League Baseball - 3 games 12-Apr 13-Apr 14-Apr
- 2023: Chicago White Sox, Major League Baseball - 2 games 21-Apr 23-Apr
- Erold Andrus (outfielder, b. 1984, Venezuela)
- 2010: York Revolution, Atlantic League (independent) - 2 games 6-Sep 24-Sep
- Axel Andueza (catcher/first base, b. 1998, Venezuela)
- 2021: Hillsboro Hops, High-A West - 1 game 10-Jul
* Elvin Andujar - see Elvin Beltre
- Horacio Andujar (pitcher, b. 1999, Dominican Republic)
- 2023: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 16-Jul
- Joaquin Andujar (pitcher, b. 1952, Dominican Republic; d. 2015, Dominican Republic)
- 1985: St. Louis Cardinals, National League (MLB) - 1 game 9-Apr
- Juan Andujar (infielder, b. 1971)
- 1993: Kinston Indians, Carolina League (High-A) - 1 game 8-Aug
- Luis Andujar (pitcher, b. 1972, Dominican Republic)
- 2003: Long Island Ducks, Atlantic League (independent) - 1 game 7-Sep
- Miguel Andujar (infielder, b. 1995, Dominican Republic)
- 2014: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 23-Apr
- 2016: Trenton Thunder, Eastern League (AA) - 4 games 2-Aug 20-Aug 8-Sep 10-Sep
- 2016: Scottsdale Scorpions, Arizona Fall League - 2 games 12-Oct 14-Oct
- 2017: Trenton Thunder, Eastern League (AA) - 1 game 15-Apr
- 2017: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 10-Sep
- 2018: New York Yankees, Major League Baseball - 3 games 25-Apr 21-Jun 16-Sep
- 2019: New York Yankees, Major League Baseball - 1 game 12-May
- 2022: New York Yankees, Major League Baseball - 1 game 28-May
- 2023: Pittsburgh Pirates, Major League Baseball - 2 games 4-May 24-Sep
- 2023: Indianapolis Indians, International League (AAA) - 1 game 1-Jul
- 2024: Oakland Athletics, Major League Baseball - 1 game 30-May
- Alfredo Angarita (infielder, b. 1996, Venezuela)
- 2018: Fresno Grizzlies, Pacific Coast League (AAA) - 1 game 13-Aug
- Anthony Angel (infielder, b. 1978, California)
- 2005: Edinburg Roadrunners, Central League (independent) - 1 game 17-Aug
- Jason Angel (pitcher, b. 1971, Virginia)
- 1993: Charleston Wheelers, South Atlantic League (Low-A) - 1 game 19-Aug
- Euribiel Angeles (infielder, b. 2002, Dominican Republic)
- 2021: Fort Wayne TinCaps, High-A Central - 1 game 18-Sep
- 2023: Lansing Lugnuts, Midwest League (High-A) - 1 game 28-Jun
- Doug Angeli (infielder, b. 1971, Wisconsin)
- 1995: Reading Phillies, Eastern League (AA) - 1 game 12-Sep
- 1996: Reading Phillies, Eastern League (AA) - 1 game 5-Apr
- 1997: Reading Phillies, Eastern League (AA) - 1 game 5-Apr
- 1997: Scranton/Wilkes-Barre Red Barons, International League (AAA) - 1 game 20-Jul
- 1998: Reading Phillies, Eastern League (AA) - 1 game 30-Aug
- Carmen Angelini (infielder, b. 1988, Louisiana)
- 2008: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 18-Aug
- 2009: Staten Island Yankees, New York-Penn League (short-season) - 3 games 20-Jul 9-Sep 14-Sep
- 2014: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 1-Sep
- Mark Angelo (first base/outfield, b. 1986, Pennsylvania)
- 2009: AZL Mariners, Arizona League (rookie) - 1 game 25-Aug
- Cesare (Chez) Angeloni (pitcher, b. 1987, Pennsylvania)
- 2009: Lowell Spinners, New York-Penn League (short-season) - 1 game 9-Sep
- Matt Angle (outfielder, b. 1985, Ohio)
- 2010: Norfolk Tides, International League (AAA) - 1 game 29-May
- 2013: Albuquerque Isotopes, Pacific Coast League (AAA) - 1 game 23-Jul
- Kris Anglin (pitcher, b. 2001, California)
- 2021: FCL Braves, Florida Complex League (rookie) - 1 game 26-Aug g1
- Jean Angomas (outfielder, b. 1995, Dominican Republic)
- Andres Angulo (catcher, b. 1997, Colombia)
- 2019: Augusta GreenJackets, South Atlantic League (Low-A) - 1 game 12-Aug
- 2021: Colombia, Americas Olympic Qualifier - 2 games 31-May 1-Jun
- Argenis Angulo (pitcher, b. 1994, Venezuela)
- 2019: Columbus Clippers, International League (AAA) - 1 game 17-Sep
- 2019: Mesa Solar Sox, Arizona Fall League - 1 game 18-Oct
- Daniel Angulo (catcher, b. 1998, Venezuela)
- 2019: GCL Pirates, Gulf Coast League (rookie) - 1 game 24-Aug g2
- Eli Ankeney (pitcher, b. 2001, Arizona)
- 2023: St. Lucie Mets, Florida State League (Low-A) - 1 game 27-Apr
- Rick Ankiel (outfielder, b. 1979, Florida)
- 2005: Springfield Cardinals, Texas League (AA) - 1 game 14-Aug
- 2010: Atlanta Braves, Major League Baseball - 1 game 19-Sep
- 2011: Washington Nationals, Major League Baseball - 1 game 30-May
- 2012: Washington Nationals, Major League Baseball - 1 game 4-Jul
- Dean Anna (infielder, b. 1986, Illinois)
- Craig Ansman (catcher, b. 1978, New York)
- 2001: South Bend Silver Hawks, Midwest League (Low-A) - 2 games 30-Jul 31-Jul
- 2004: Tucson Sidewinders, Pacific Coast League (AAA) - 1 game 9-Aug
- Kyle Anson (infielder, b. 1983, Texas)
- Brad Antchak (infielder, b. 1995, British Columbia)
- 2018: Quebec Les Capitales, Can-Am League (independent) - 2 games 5-Sep 14-Sep
- Jose Antequera (infielder, b. 1995, Venezuela)
- 2017: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 15-Apr night
- 2018: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 13-Sep
- Joe Anthonsen (infielder, b. 1982, Minnesota)
- 2006: Rockford RiverHawks, Frontier League (independent) - 1 game 8-Aug
- 2008: Rockford RiverHawks, Frontier League (independent) - 1 game 16-Aug
- 2010: Sioux Falls Pheasants, American Association (independent) - 1 game 24-Aug g2
- Brian Anthony (infielder, b. 1973, California)
- 1997: Asheville Tourists, South Atlantic League (Low-A) - 1 game 14-Aug
- 1999: Salem Avalanche, Carolina League (High-A) - 1 game 9-Aug
- Eric Anthony (outfielder, b. 1967, California)
- Keaton Anthony (first base/outfield, b. 2001, Indiana)
- Roman Anthony (outfielder, b. 2004, Florida)
- 2023: Greenville Drive, South Atlantic League (High-A) - 1 game 21-Jun
- 2024: Worcester Red Sox, International League (AAA) - 1 game 22-Sep
- Mike Antico (outfielder, b. 1998, New Jersey)
- 2021: Palm Beach Cardinals, Low-A Southeast - 3 games 12-Aug 2-Sep g1 2-Sep g2
- 2022: Peoria Chiefs, Midwest League (High-A) - 1 game 25-Jun
- 2022: Salt River Rafters, Arizona Fall League - 2 games 13-Oct 14-Oct
- Nilson Antigua (catcher, b. 1975, Dominican Republic)
- 1996: Erie SeaWolves, New York-Penn League (short-season) - 3 games 3-Aug 14-Aug 22-Aug
- Chase Antle (pitcher, b. 1997, Ohio)
- 2023: Jersey Shore BlueClaws, South Atlantic League (High-A) - 1 game 10-May
- Matt Antonelli (infielder, b. 1985, Massachusetts)
- 2006: Eugene Emeralds, Northwest League (short-season) - 1 game 22-Aug
- 2007: San Antonio Missions, Texas League (AA) - 1 game 15-Aug
- 2008: San Diego Padres, Major League Baseball - 1 game 21-Sep
- 2011: Syracuse Chiefs, International League (AAA) - 2 games 3-Jul 20-Aug
- 2012: Scranton/Wilkes-Barre Yankees, International League (AAA) - 1 game 27-May
- Dustin Antolin (pitcher, b. 1989, Hawaii)
- 2017: Somerset Patriots, Atlantic League (independent) - 2 games 13-Aug 23-Sep
- Sam Antonacci (infielder, b. 2003, Illinois)
- 2024: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 11-Aug g2
- Donovan Antonia (outfielder, b. 2003, Curacao)
- 2023: Daytona Tortugas, Florida State League (Low-A) - 1 game 30-Jul
- Mike Antonini (pitcher, b. 1985, Pennsylvania)
- 2009: Binghamton Mets, Eastern League (AA) - 1 game 8-Apr
- 2011: Chattanooga Lookouts, Southern League (AA) - 1 game 7-Aug
- 2014: New Jersey Jackals, Can-Am League (independent) - 2 games 3-Sep 8-Sep
- 2017: Somerset Patriots, Atlantic League (independent) - 1 game 13-Aug
- 2018: Somerset Patriots, Atlantic League (independent) - 2 games 16-Jun 23-Sep
- Michael Antonio (utility, b. 1991, New York)
- 2016: Sussex County Miners, Can-Am League (independent) - 1 game 30-May
- Pat Antrim (utility, b. 1973, Nebraska)
- 1997: Greensboro Bats, South Atlantic League (Low-A) - 1 game 15-Aug
- Yasel Antuna (infielder, then outfielder, b. 1999, Dominican Republic)
- 2018: Hagerstown Suns, South Atlantic League (Low-A) - 2 games 23-May 4-Jul
- 2022: Harrisburg Senators, Eastern League (AA) - 1 game 1-Sep
- 2022: Peoria Javelinas, Arizona Fall League - 1 game 14-Oct
- Ismel Antunez (outfielder, b. 1991, Venezuela)
- 2012: Princeton Rays, Appalachian League (rookie) - 1 game 17-Aug g2
- Norichika Aoki (outfielder, b. 1982, Japan)
- 2013: Milwaukee Brewers, Major League Baseball - 1 game 17-Aug
- 2014: Kansas City Royals, Major League Baseball - 1 game 5-Sep
- 2017: New York Mets, Major League Baseball - 4 games 25-Sep g1 25-Sep g2 27-Sep 1-Oct
- Tomoshi Aoki (outfielder, b. 1979, Japan)
- 2003: Wisconsin Timber Rattlers, Midwest League (Low-A) - 1 game 30-Jul
- Juan Aparicio (catcher, b. 2000, Venezuela)
- Julio Aparicio (outfielder, b. 1990, Panama)
- 2009: Idaho Falls Chukars, Pioneer League (rookie) - 1 game 16-Aug
- Miguel Aparicio (outfielder, b. 1999, Venezuela)
- 2019: Hickory Crawdads, South Atlantic League (Low-A) - 2 games 30-Apr 11-Aug
- Ryan Aper (outfielder, b. 1993, Illinois)
- 2015: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 10-Aug
- Garrett Apker (pitcher, b. 1999, California)
- Andrew Aplin (outfielder, b. 1991, California)
- 2012: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 7-Aug
- 2014: Salt River Rafters, Arizona Fall League - 2 games 8-Oct 10-Oct
- 2018: Tacoma Rainiers, Pacific Coast League (AAA) - 1 game 9-Aug
- Juan Apodaca (catcher, b. 1986, Venezuela)
- 2010: Portland Sea Dogs, Eastern League (AA) - 1 game 30-May
- 2014: Lancaster Barnstormers, Atlantic League (independent) - 1 game 27-Sep
- Luis Apodaca (catcher, b. 1982, Venezuela)
- 2005: Vermont Expos, New York-Penn League (short-season) - 1 game 4-Aug
- Juan Aponte (catcher/first base, b. 1988, Venezuela)
- 2009: Mahoning Valley Scrappers, New York-Penn League (short-season) - 1 game 8-Sep
- Leonel Aponte (pitcher, b. 1999, Venezuela)
- Yhoangel Aponte (outfielder, b. 2004, Venezuela)
- Sherten Apostel (infielder, b. 1999, Curacao)
- 2019: Hickory Crawdads, South Atlantic League (Low-A) - 1 game 30-Apr
- Joe Apotheker (outfielder, b. 1980, Massachusetts)
- 2002: Jamestown Jammers, New York-Penn League (short-season) - 1 game 30-Jun
- 2003: Richmond Roosters, Frontier League (independent) - 1 game 26-Jul
- Jackson Appel (catcher, b. 2001, Texas)
- 2024: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 11-Aug g2
- Mark Appel (pitcher, b. 1991, Texas)
- 2014: Salt River Rafters, Arizona Fall League - 1 game 8-Oct
- Luke Appert (utility, b. 1980, Minnesota)
- 2008: Reading Phillies, Eastern League (AA) - 2 games 4-Aug 1-Sep
- Kevin Appier (pitcher, b. 1967, California)
- 1998: Omaha Royals, Pacific Coast League (AAA) - 1 game 21-Aug g1
- Paul Applebee (pitcher, b. 1988, California)
- 2011: Hagerstown Suns, South Atlantic League (Low-A) - 1 game 2-Jul
- Rene Aqueron (infielder, b. 1981, Puerto Rico)
- 2007: Camden Riversharks, Atlantic League (independent) - 1 game 3-Jul
- Anthony Aquilino (infielder, b. 1982, Pennsylvania)
- 2005: Camden Riversharks, Atlantic League (independent) - 1 game 24-Jun
- Alex Aquino (pitcher, b. 1996, Dominican Republic)
- 2021: Bradenton Marauders, Low-A Southeast - 2 games 13-May 14-May
- Aristides Aquino (outfielder, b. 1994, Dominican Republic)
- 2016: Daytona Tortugas, Florida State League (High-A) - 2 games 23-Aug g1 23-Aug g2
- 2019: Cincinnati Reds, Major League Baseball - 1 game 20-Sep
- Dariel Aquino (pitcher, b. 1996, Dominican Republic)
- 2017: Greeneville Astros, Appalachian League (rookie) - 1 game 26-Aug
- Greg Aquino (pitcher, b. 1978, Dominican Republic)
- 2013: Sugar Land Skeeters, Atlantic League (independent) - 1 game 20-Sep
- Jayson Aquino (pitcher, b. 1992, Dominican Republic)
- 2014: Salt River Rafters, Arizona Fall League - 1 game 10-Oct
- 2018: Bowie Baysox, Eastern League (AA) - 1 game 28-May
- Jose Aquino (pitcher, b. 1986)
- 2010: Brockton Rox, Can-Am League (independent) - 1 game 28-Jul
- Julio Aquino (pitcher, b. 1972, Dominican Republic)
- 1996: Hudson Valley Renegades, New York-Penn League (short-season) - 2 games 4-Jul 7-Jul
- Juan Aracena (pitcher, b. 1976, Dominican Republic)
- 1996: Burlington Indians, Appalachian League (rookie) - 1 game 27-Jul g2
- Ricky Aracena (infielder, b. 1997, Dominican Republic)
- 2018: Lexington Legends, South Atlantic League (Low-A) - 1 game 13-Sep
- Sandy Aracena (catcher, b. 1981, Dominican Republic)
- 2004: Bakersfield Blaze, California League (High-A) - 1 game 12-Aug
- 2006: Road Warriors, Atlantic League (independent) - 1 game 16-Sep
- 2007: Road Warriors, Atlantic League (independent) - 1 game 3-Jul
- 2007: York Revolution, Atlantic League (independent) - 1 game 26-Aug
- 2008: York Revolution, Atlantic League (independent) - 1 game 20-Sep
- Wellington Aracena (pitcher, b. 2004, Dominican Republic)
- 2024: St. Lucie Mets, Florida State League (Low-A) - 1 game 6-Sep
- Brian Aragon (outfielder, b. 1984, Florida)
- 2006: Staten Island Yankees, New York-Penn League (short-season) - 1 game 28-Jul
- Bryant Aragon (first baseman, b. 1998, Mexico)
- 2017: Tri-City Dust Devils, Northwest League (short-season) - 1 game 4-Aug
- Armando Araiza (catcher, b. 1993, Mexico)
- Bryan Araiza (outfielder, b. 1996, Mexico)
- 2017: Hillsboro Hops, Northwest League (short-season) - 2 games 29-Jul 4-Aug
- Tim Arakawa (infielder, b. 1993, Hawaii)
- 2015: Burlington Bees, Midwest League (Low-A) - 2 games 28-Aug 4-Sep
- Yusuke Arakawa (pitcher, b. 1978, Japan)
- 2004: Visalia Oaks, California League (High-A) - 2 games 8-Aug 17-Aug
- Jonathan Aranda (infielder, b. 1998, Mexico)
- Nick Aranda (outfielder, b. 1983, Texas)
- 2007: Edinburg Coyotes, United League (independent) - 1 game 14-Aug
- Cesar Aranguren (infielder, b. 1983)
- 2007: Pensacola Pelicans, American Association (independent) - 1 game 12-Aug
- Frainger Aranguren (pitcher, b. 1997, Venezuela)
- 2021: Daytona Tortugas, Low-A Southeast - 1 game 22-Jun
- 2023: Daytona Tortugas, Florida State League (Low-A) - 2 games 11-Jun 28-Jul
- Victor Arano (pitcher, b. 1995, Mexico)
- 2016: Reading Fightin Phils, Eastern League (AA) - 1 game 10-Sep
- 2017: Philadelphia Phillies, Major League Baseball - 1 game 1-Oct
- 2018: Lehigh Valley IronPigs, International League (AAA) - 1 game 17-May
- 2018: Philadelphia Phillies, Major League Baseball - 2 games 9-Jul g1 9-Jul g2
- Luis Araujo (pitcher, b. 1996, Venezuela)
- 2018: Mahoning Valley Scrappers, New York-Penn League (short-season) - 1 game 2-Aug
- Ramon Araujo (infielder, b. 1978, Dominican Republic)
- 2000: Peoria Chiefs, Midwest League (Low-A) - 1 game (as Ramon Carvajal) 12-Aug
- Jonathan Arauz (infielder, b. 1998, Panama)
- 2017: Tri-City ValleyCats, New York-Penn League (short-season) - 3 games 22-Jul 12-Aug g1 12-Aug g2
- 2018: Buies Creek Astros, Carolina League (High-A) - 1 game 29-Aug
- 2019: Fayetteville Woodpeckers, Carolina League (High-A) - 1 game 4-May
- 2021: Boston Red Sox, Major League Baseball - 2 games 1-Aug 1-Sep
- Julian Arballo (pitcher, b. 1987)
- 2010: Florence Freedom, Frontier League (independent) - 1 game 3-Sep
- Yazy Arbelo (first baseman, b. 1988, Florida)
- 2014: Traverse City Beach Bums, Frontier League (independent) - 1 game 27-Aug
- Mike Arbinger (outfielder, b. 1980, Ohio)
- 2006: Washington Wild Things, Frontier League (independent) - 1 game 8-Aug
- Cory Arbiso (pitcher, b. 1986, California)
- 2010: Trenton Thunder, Eastern League (AA) - 2 games 5-Sep 18-Sep
- 2012: Trenton Thunder, Eastern League (AA) - 1 game 5-Apr
- Luis Arcaya (first baseman, b. 1999, Venezuela)
- 2021: Jupiter Hammerheads, Low-A Southeast - 1 game 22-Jun
- Luis Arcendo (infielder, b. 1999, Dominican Republic)
- 2019: GCL Rays, Gulf Coast League (rookie) - 1 game 9-Aug
- Chris Archer (pitcher, b. 1988, North Carolina)
- 2017: Tampa Bay Rays, Major League Baseball - 1 game 24-Sep
- 2018: Tampa Bay Rays, Major League Baseball - 1 game 29-Mar
- 2021: Tampa Bay Rays, Major League Baseball - 1 game 22-Aug
- 2022: Minnesota Twins, Major League Baseball - 2 games 30-Apr 5-May
- Kurt Archer (pitcher, b. 1969)
- 1990: Beloit Brewers, Midwest League (Low-A) - 1 game 14-Aug
- Nathan Archer (outfielder, b. 2003, Ohio)
- 2024: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 11-Aug g1
- Phil Archer (catcher, b. 1979, California)
- 2003: Kalamazoo Kings, Frontier League (independent) - 1 game 28-Jul
- Francisco Arcia (catcher, b. 1989, Venezuela)
- 2012: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 9-Aug
- 2014: Trenton Thunder, Eastern League (AA) - 1 game 27-Jul
- 2015: Trenton Thunder, Eastern League (AA) - 1 game 17-Jun
- 2018: Los Angeles Angels, Major League Baseball - 1 game 11-Aug
- 2021: West Virginia Power, Atlantic League (independent) - 1 game 19-Sep
- Orlando Arcia (infielder, b. 1994, Venezuela)
- 2015: Biloxi Shuckers, Southern League (AA) - 1 game 29-Jul
- 2017: Milwaukee Brewers, Major League Baseball - 1 game 29-May
- 2018: Milwaukee Brewers, Major League Baseball - 2 games 13-Apr 22-Sep
- 2019: Milwaukee Brewers, Major League Baseball - 1 game 4-Jun
- 2022: Atlanta Braves, Major League Baseball - 3 games 3-May g1 25-Sep 26-Sep
- 2022: Gwinnett Stripers, International League (AAA) - 1 game 30-Aug
- 2023: Atlanta Braves, Major League Baseball - 1 game 7-Jun
- 2024: Atlanta Braves, Major League Baseball - 1 game 17-Jun
- Oswaldo Arcia (outfielder, b. 1991, Venezuela)
- 2012: New Britain Rock Cats, Eastern League (AA) - 1 game 4-Jul
- 2013: Minnesota Twins, Major League Baseball - 1 game 18-Aug
- 2015: Rochester Red Wings, International League (AAA) - 1 game 4-Jul
- 2016: San Diego Padres, Major League Baseball - 1 game 1-Sep
- Dan Arcila (infielder, b. 1990, Venezuela)
- 2013: Vancouver Canadians, Northwest League (short-season) - 2 games 20-Aug 21-Aug
- Taylor Ard (infielder, b. 1990, Washington)
- 2016: Jupiter Hammerheads, Florida State League (High-A) - 2 games 27-Aug 30-Aug
- 2018: Long Island Ducks, Atlantic League (independent) - 2 games 4-Sep 23-Sep
- Danny Ardoin (catcher, b. 1974, Louisiana)
- 1998: Huntsville Stars, Southern League (AA) - 1 game 27-Aug
- 2005: Colorado Rockies, Major League Baseball - 1 game 2-Oct
- Luis Arejula (pitcher, b. 2002, Venezuela)
- 2024: Tampa Tarpons, Florida State League (Low-A) - 2 games 15-Aug 18-Aug
- Cie Arell (outfielder, b. 1988)
- 2014: Raton Osos, Pecos League (independent) - 1 game 22-Jul
- Felix Arellan (pitcher, b. 1981, Venezuela)
- 2008: Quebec Les Capitales, Can-Am League (independent) - 1 game 20-Aug
- Jonah Arenado (infielder, b. 1995, California)
- 2017: San Jose Giants, California League (High-A) - 1 game 1-Aug
- Nolan Arenado (infielder, b. 1991, California)
- 2013: Colorado Rockies, Major League Baseball - 1 game 28-Aug
- 2014: Colorado Rockies, Major League Baseball - 1 game 9-Sep
- 2015: Colorado Rockies, Major League Baseball - 1 game 1-Aug
- 2018: Colorado Rockies, Major League Baseball - 2 games 6-May 23-Aug
- 2019: Colorado Rockies, Major League Baseball - 1 game 3-Apr
- 2021: St. Louis Cardinals, Major League Baseball - 1 game 17-Sep
- 2022: St. Louis Cardinals, Major League Baseball - 2 games 7-Jun 9-Jun
- 2023: St. Louis Cardinals, Major League Baseball - 1 game 5-Jun
- 2024: St. Louis Cardinals, Major League Baseball - 1 game 5-Aug
- Pedro Arenas (infielder, b. 1973, Illinois)
- 1996: Utica Blue Sox, New York-Penn League (short-season) - 1 game 6-Jul
- J.P. Arencibia (catcher/first base, b. 1986, Florida)
- 2016: Lehigh Valley IronPigs, International League (AAA) - 1 game 4-May
- 2016: Durham Bulls, International League (AAA) - 1 game 21-Aug
- Angel Arevalo (infielder, b. 2003, Venezuela)
- 2023: Stockton Ports, California League (Low-A) - 1 game 10-Aug
- Shaun Argento (catcher, b. 1975, California)
- 2002: Washington Wild Things, Frontier League (independent) - 1 game 28-Jul
- Willie Argo (outfielder, b. 1989, Iowa)
- 2012: Princeton Rays, Appalachian League (rookie) - 2 games 17-Aug g1 17-Aug g2
- 2015: St. Paul Saints, American Association (independent) - 1 game 1-Sep
- Manny Argomaniz (catcher/infielder, b. 1993, California)
- 2017: Staten Island Yankees, New York-Penn League (short-season) - 3 games 9-Aug 9-Sep 12-Sep
- Carlos Arguello (pitcher, b. 1981, New Mexico)
- 2003: Gateway Grizzlies, Frontier League (independent) - 1 game 29-Jul
- Doug Arguello (pitcher, b. 1984, Nicaragua)
- 2006: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 13-Sep
- 2012: Somerset Patriots, Atlantic League (independent) - 2 games 22-Aug 20-Sep
- 2013: Sugar Land Skeeters, Atlantic League (independent) - 1 game 20-Sep
- Matt Argyropoulos (infielder, b. 1988, Washington)
- 2013: Asheville Tourists, South Atlantic League (Low-A) - 1 game 26-May
- Josh Arhart (catcher, b. 1979, California)
- 2008: Orange County Flyers, Golden League (independent) - 2 games 26-Jul 1-Aug
- 2008: Camden Riversharks, Atlantic League (independent) - 1 game 28-Sep
- 2009: York Revolution, Atlantic League (independent) - 1 game 31-Aug
- Develson Aria (pitcher, b. 2001, Dominican Republic)
- 2021: FCL Twins, Florida Complex League (rookie) - 1 game 24-Aug g1
- 2023: Fort Myers Mighty Mussels, Florida State League (Low-A) - 3 games 13-Apr 17-May 9-Jun
- Ryan Ariail (pitcher, b. 1984, South Carolina)
- 2006: Traverse City Beach Bums, Frontier League (independent) - 1 game 11-Aug
- 2009: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 10-Apr
- Alex Arias (infielder, b. 1967, New York)
- 1996: Florida Marlins, National League (MLB) - 2 games 9-Sep 10-Sep
- 1997: Florida Marlins, National League (MLB) - 1 game 27-Sep
- 1998: Philadelphia Phillies, National League (MLB) - 1 game 13-Sep
- 1999: Philadelphia Phillies, National League (MLB) - 1 game 3-Oct
- 2000: Philadelphia Phillies, Major League Baseball - 3 games 11-Sep g1 11-Sep g2 24-Sep
- Amador Arias (infielder, b. 1972, Venezuela)
- 1991: Erie Sailors, New York-Penn League (short-season) - 1 game 11-Aug
- 1994: Winston-Salem Spirits, Carolina League (High-A) - 1 game 4-Aug
- Andry Arias (outfielder, b. 2000, Dominican Republic)
- 2019: GCL Nationals, Gulf Coast League (rookie) - 1 game 8-Aug
- Angel Arias (catcher, b. 1982, Dominican Republic)
- 2003: Bristol Sox, Appalachian League (rookie) - 1 game 12-Jul
- Benjamin Arias (pitcher, b. 2001, Dominican Republic)
- 2023: Palm Beach Cardinals, Florida State League (Low-A) - 1 game 9-Jul
- Brian Arias (pitcher, b. 2003, Dominican Republic)
- 2024: FCL Yankees, Florida Complex League (rookie) - 1 game 23-Jul
- Dani Arias (infielder, b. 1987, Dominican Republic)
- 2008: Vermont Lake Monsters, New York-Penn League (short-season) - 1 game 6-Aug
- Daury Arias (outfielder, b. 2001, Puerto Rico)
- Dayeison Arias (pitcher, b. 1997, Dominican Republic)
- 2021: Peoria Javelinas, Arizona Fall League - 1 game 16-Oct
- Diosbel Arias (infielder, b. 1996, Cuba)
- 2019: Down East Wood Ducks, Carolina League (High-A) - 1 game 4-May
- 2022: Round Rock Express, Pacific Coast League (AAA) - 1 game 3-Aug
- Estarlin Arias (pitcher, b. 1994, Dominican Republic)
- 2017: Palm Beach Cardinals, Florida State League (High-A) - 1 game 27-May
- Frankeli Arias (pitcher, b. 2003, Dominican Republic)
- 2024: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 12-May
- Franklin Arias (infielder, b. 2005, Dominican Republic)
- 2024: FCL Red Sox, Florida Complex League (rookie) - 1 game 7-May
- Gabriel Arias (pitcher, b. 1989, Dominican Republic)
- 2012: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 21-Aug
- 2014: Columbus Clippers, International League (AAA) - 1 game 23-Aug
- Gabriel Arias (infielder, b. 2000, Venezuela)
- 2017: Fort Wayne TinCaps, Midwest League (Low-A) - 1 game 19-Aug
- 2021: Columbus Clippers, Triple-A East - 1 game 8-Aug
- 2022: Cleveland Guardians, Major League Baseball - 1 game 28-Sep
- 2022: Santurce Cangrejeros, Liga Clemente (winter) - 4 games 29-Nov 3-Dec 4-Dec g1 4-Dec g2
- 2023: Cleveland Guardians, Major League Baseball - 1 game 13-Aug
- George Arias (infielder, b. 1972, Arizona)
- 1994: Lake Elsinore Storm, California League (High-A) - 2 games 28-Aug 30-Aug
- 1998: Las Vegas Stars, Pacific Coast League (AAA) - 1 game 17-Aug
- Harol Arias (pitcher, b. 2002, Venezuela)
- 2021: FCL Orioles Black, Florida Complex League (rookie) - 1 game 26-Aug g2
- Jean Carlos Arias (outfielder, b. 1998, Dominican Republic)
- 2018: Cedar Rapids Kernels, Midwest League (Low-A) - 1 game 6-Aug
- Joaquin Arias (infielder, b. 1984, Dominican Republic)
- 2004: Stockton Ports, California League (High-A) - 2 games 19-Aug g1 19-Aug g2
- 2005: Frisco Roughriders, Texas League (AA) - 1 game 14-Aug
- 2010: New York Mets, Major League Baseball - 6 games 4-Sep 15-Sep 19-Sep 29-Sep g2 2-Oct 3-Oct
- 2011: Omaha Storm Chasers, Pacific Coast League (AAA) - 1 game 1-Sep
- 2012: San Francisco Giants, Major League Baseball - 1 game 4-Jul
- 2013: San Francisco Giants, Major League Baseball - 3 games 31-Jul 28-Aug 18-Sep
- Jose Arias (pitcher, b. 1970, Dominican Republic)
- 1990: Hamilton Redbirds, New York-Penn League (short-season) - 1 game 16-Aug
- Kevin Arias (infielder, b. 1999, Venezuela)
- 2019: Orem Owlz, Pioneer League (rookie) - 1 game 7-Jul
- Leandro Arias (infielder, b. 1981, Dominican Republic)
- 2001: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 25-Aug
- Leandro Arias (infielder, b. 2005, Dominican Republic)
- Luarbert Arias (pitcher, b. 2000, Venezuela)
- 2022: Jupiter Hammerheads, Florida State League (Low-A) - 1 game 19-May
- 2023: Beloit Sky Carp, Midwest League (High-A) - 1 game 25-Jun g2
- Martires Arias (pitcher, b. 1990, Dominican Republic)
- 2014: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 13-Aug g2
- Richard Arias (infielder, b. 1991, Massachusetts)
- Roderick Arias (infielder, b. 2004, Dominican Republic)
- Rogelio Arias (catcher, b. 1976, Dominican Republic)
- 1996: Asheville Tourists, South Atlantic League (Low-A) - 1 game 29-Aug
- 1999: Salem Avalanche, Carolina League (High-A) - 1 game 9-Aug
- Santos Arias (pitcher, b. 1987, Dominican Republic)
- 2010: New Britain Rock Cats, Eastern League (AA) - 1 game 30-May
- Skylar Arias (pitcher, b. 1997, Florida)
- 2022: Winston-Salem Dash, South Atlantic League (High-A) - 1 game 17-Jul
- Victor Arias (outfielder, b. 2003, Venezuela)
- Wander Arias (pitcher, b. 1999, Dominican Republic)
- 2023: Quad Cities River Bandits, Midwest League (High-A) - 1 game 24-Jun
- Wilkins Arias (pitcher, b. 1980, Dominican Republic)
- Kevin Arico (pitcher, b. 1988, New Jersey)
- 2010: Billings Mustangs, Pioneer League (rookie) - 1 game 27-Aug
- Kohei Arihara (pitcher, b. 1992, Japan)
- 2021: Texas Rangers, Major League Baseball - 1 game 14-Apr
- Tyson Arishenkoff (infielder, b. 1980, British Columbia)
- 2003: Evansville Otters, Frontier League (independent) - 1 game 26-Jul
- Luis Ariza (catcher/first base, b. 2004, Venezuela)
- 2023: FCL Rays, Florida Complex League (rookie) - 1 game 8-Jul
- Kyle Arjona (pitcher, b. 1997, Florida)
- 2019: Clearwater Threshers, Florida State League (High-A) - 3 games 5-Aug 24-Aug 29-Aug
- Patrick Arlis (catcher, b. 1980, Illinois)
- 2002: Jamestown Jammers, New York-Penn League (short-season) - 1 game 30-Jun
- 2008: Calgary Vipers, Golden League (independent) - 1 game 27-Jul
- 2009: Nashville Sounds, Pacific Coast League (AAA) - 1 game 24-Aug
- Gustavo Armas (pitcher, b. 1996, Venezuela)
- Tony Armas (outfielder, b. 1953, Venezuela)
- 1980: Oakland Athletics, American League (MLB) - 1 game 2-Sep
- Ed Armbrister (outfielder, b. 1948, Bahamas; d. 2021, Bahamas)
- 1976: Cincinnati Reds, National League (MLB) - 1 game 14-Aug
- Justin Armbruester (pitcher, b. 1998, Washington)
- 2021: FCL Orioles Orange, Florida Complex League (rookie) - 1 game 17-Aug
- 2021: Delmarva Shorebirds, Low-A East - 1 game 5-Sep
- David Armendariz (outfielder, b. 1991, California)
- 2014: Mahoning Valley Scrappers, New York-Penn League (short-season) - 1 game 29-Aug
- Erubiel Armenta (pitcher, b. 2000, Mexico)
- 2021: Clearwater Threshers, Low-A Southeast - 1 game 26-Jun
- 2022: Jersey Shore BlueClaws, South Atlantic League (High-A) - 1 game 4-May
- Lazaro Armenteros (outfielder, b. 1999, Cuba)
- 2018: Beloit Snappers, Midwest League (Low-A) - 1 game 6-Aug
- 2023: Mesa Solar Sox, Arizona Fall League - 2 games 11-Oct 13-Oct
- Rogelio Armenteros (pitcher, b. 1994, Cuba)
- 2015: Tri-City ValleyCats, New York-Penn League (short-season) - 1 game 4-Aug
- 2016: Glendale Desert Dogs, Arizona Fall League - 1 game 14-Oct
- Barry Armitage (pitcher, b. 1979, South Africa)
- 2007: Lancaster Barnstormers, Atlantic League (independent) - 1 game 13-Sep
- Jon Armitage (outfielder, b. 1980, Georgia)
- 2007: Gateway Grizzlies, Frontier League (independent) - 1 game 7-Aug
- Andy Armstrong (infielder, b. 1997, Oregon)
- 2021: Ogden Raptors, Pioneer League (independent) - 1 game 9-Jul
- 2022: Evansville Otters, Frontier League (independent) - 1 game 5-Jul
- Cole Armstrong (catcher, b. 1983, British Columbia)
- 2006: Winston-Salem Warthogs, Carolina League (High-A) - 1 game 29-Jul
- 2007: Birmingham Barons, Southern League (AA) - 1 game 17-Aug
- 2013: Wichita Wingnuts, American Association (independent) - 1 game 10-Aug g1
- Jason Armstrong (infielder, b. 1981, California)
- 2004: Auburn Doubledays, New York-Penn League (short-season) - 1 game 4-Aug
- 2006: Lansing Lugnuts, Midwest League (Low-A) - 1 game 12-Aug
- Patrick Armstrong (first base/outfield, b. 1991, California)
- 2014: AZL Angels, Arizona League (rookie) - 1 game 20-Jul
- Shawn Armstrong (pitcher, b. 1990, North Carolina)
- 2012: Akron Aeros, Eastern League (AA) - 1 game 15-Sep
- 2014: Akron RubberDucks, Eastern League (AA) - 1 game 3-Aug
- 2014: Columbus Clippers, International League (AAA) - 1 game 23-Aug
- 2019: Baltimore Orioles, Major League Baseball - 1 game 3-Sep g1
- 2021: Norfolk Tides, Triple-A East - 1 game 16-Jun
- 2021: Tampa Bay Rays, Major League Baseball - 1 game 22-Aug
- 2022: Miami Marlins, Major League Baseball - 1 game 16-Apr
- 2022: Tampa Bay Rays, Major League Baseball - 6 games 8-Jun 21-Aug 22-Aug 25-Aug 4-Sep 20-Sep
- 2023: Tampa Bay Rays, Major League Baseball - 7 games 10-Jun 26-Jul 22-Aug 24-Aug 30-Aug 10-Sep 21-Sep
- 2024: Tampa Bay Rays, Major League Baseball - 10 games 31-Mar 3-Apr 16-Apr 17-Apr 3-May 5-May 10-May 30-May 8-Jun 28-Jul
- 2024: St. Louis Cardinals, Major League Baseball - 1 game 5-Aug
- Jean Arnaez (catcher/first base, b. 2002, Panama)
- Cristo Arnal (infielder, b. 1985, Venezuela)
- 2009: Akron Aeros, Eastern League (AA) - 1 game 29-Jul
- Juan Arnaud (pitcher, b. 2003, Dominican Republic)
- 2024: St. Lucie Mets, Florida State League (Low-A) - 2 games 5-Jun 6-Sep
- Erik Arnesen (pitcher, b. 1984, New Jersey)
- 2014: Somerset Patriots, Atlantic League (independent) - 1 game 28-Sep
- Justin Arneson (outfielder, b. 1981, Wisconsin)
- 2003: Elizabethton Twins, Appalachian League (rookie) - 1 game 12-Jul
- Zach Arneson (pitcher, b. 1988, California)
- Adam Arnold (pitcher, b. 1986, British Columbia)
- 2012: London Rippers, Frontier League (independent) - 1 game 26-May
- Bryce Arnold (infielder, b. 2001, Ontario)
- Chandler Arnold (pitcher, b. 1999, Texas)
- 2023: Palm Beach Cardinals, Florida State League (Low-A) - 1 game 7-Jul
- Eric Arnold (infielder, b. 1980, Texas)
- 2002: Medicine Hat Blue Jays, Pioneer League (rookie) - 1 game 4-Aug
- 2003: Charleston Alley Cats, South Atlantic League (Low-A) - 1 game 13-Jul
- Jamie Arnold (pitcher, b. 1974, Michigan)
- 2000: Chicago Cubs, Major League Baseball - 1 game 2-Sep
- Jason Arnold (pitcher, b. 1979, Florida)
- 2001: Staten Island Yankees, New York-Penn League (short-season) - 1 game 6-Jul
- Jeff Arnold (catcher, b. 1988, Kentucky)
- 2018: Richmond Flying Squirrels, Eastern League (AA) - 1 game 4-Jun
- Ken Arnold (infielder, b. 1969)
- 1994: Bowie Baysox, Eastern League (AA) - 1 game 10-Jul
- 1995: Winnipeg Goldeyes, Northern League (independent) - 1 game 8-Aug
- 1998: Somerset Patriots, Atlantic League (independent) - 1 game 12-Jul
- 1999: Somerset Patriots, Atlantic League (independent) - 3 games 21-Jul 11-Sep g1 11-Sep g2
- Patrick Arnold (pitcher, b. 1988, West Virginia)
- 2008: Vermont Lake Monsters, New York-Penn League (short-season) - 1 game 6-Aug
- Zach Arnold (infielder, b. 2001, California)
- Brian Arntzen (catcher, b. 1970, California)
- 1993: Kinston Indians, Carolina League (High-A) - 1 game 8-Aug
- Jonathan Aro (pitcher, b. 1990, Dominican Republic)
- 2019: Mississippi Braves, Southern League (AA) - 1 game 10-Aug
- Vince Arobio (pitcher, b. 1995, California)
- 2019: Glendale Desert Dogs, Arizona Fall League - 1 game 16-Oct
- Rene Arocha (pitcher, b. 1966, Cuba)
- 1993: St. Louis Cardinals, National League (MLB) - 1 game 28-Sep
- Jeremy Arocho (infielder, b. 1998, Maryland)
- 2022: RA12, Liga Clemente (winter) - 1 game 30-Nov
- Randy Arozarena (outfielder, b. 1995, Cuba)
- Luis Arraez (utility, b. 1997, Venezuela)
- Matt Arrandale (pitcher, b. 1970, Missouri)
- 1997: Louisville Redbirds, American Association (AAA) - 1 game 9-Aug g2
- Joe Arredondo (infielder, b. 1970)
- 1990: Pittsfield Mets, New York-Penn League (short-season) - 1 game 17-Aug
- Jose Arredondo (pitcher, b. 1984, Dominican Republic)
- 2009: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 26-Aug
- 2011: Cincinnati Reds, Major League Baseball - 1 game 26-Sep
- Daryl Arreola (pitcher, b. 1982, Arizona)
- 2006: Yakima Bears, Northwest League (short-season) - 1 game 23-Aug
- Daniel Arribas (catcher/infielder, b. 1992, Florida)
- 2015: West Virginia Black Bears, New York-Penn League (short-season) - 2 games 8-Aug 13-Sep
- 2016: West Virginia Power, South Atlantic League (Low-A) - 1 game 2-Jul
- 2017: Rockland Boulders, Can-Am League (independent) - 6 games 8-Aug 10-Aug 14-Aug 17-Aug 7-Sep 10-Sep
- Gio Arriera (pitcher, b. 1998, Florida)
- 2018: Connecticut Tigers, New York-Penn League (short-season) - 1 game 30-Jul
- 2021: Lakeland Flying Tigers, Low-A Southeast - 1 game 5-May
- Jake Arrieta (pitcher, b. 1986, Missouri)
- 2014: Chicago Cubs, Major League Baseball - 1 game 20-Jul
- Edwin Arroyo (infielder, b. 2003, Puerto Rico)
- 2024: Glendale Desert Dogs, Arizona Fall League - 1 game 10-Oct
- Junior Arrojo (infielder, b. 1988)
- Rolando Arrojo (pitcher, b. 1968, Cuba)
- 1998: Tampa Bay Devil Rays, American League (MLB) - 1 game 9-Aug
- Felix Arronde (pitcher, b. 2003, Cuba)
- 2023: Columbia Fireflies, Carolina League (Low-A) - 1 game 8-Sep
- Jason Arrowood (catcher, b. 1980, Oklahoma)
- 2007: Southern Illinois Miners, Frontier League (independent) - 1 game 7-Aug
- Jonathon Arrowood (first baseman, b. 1994, Texas)
- 2016: GCL Rays, Gulf Coast League (rookie) - 1 game 26-Aug
- Abner Arroyo (outfielder, b. 1979, Puerto Rico)
- 2001: Fort Wayne Wizards, Midwest League (Low-A) - 1 game 28-Jul
- 2003: Brockton Rox, Northeast League (independent) - 2 games 4-Sep 5-Sep
- 2005: Sioux Falls Canaries, Northern League (independent) - 1 game 10-Aug
- 2006: Sioux Falls Canaries, American Association (independent) - 1 game 6-Aug
- Carlos Arroyo (outfielder, b. 1981, Colombia)
- 2004: Inland Empire 66ers, California League (High-A) - 1 game 8-Aug
- 2008: Edmonton Cracker-Cats, Golden League (independent) - 1 game 26-Jul
- Carlos Arroyo (outfielder, b. 1993, Venezuela)
- 2016: Hickory Crawdads, South Atlantic League (Low-A) - 2 games 18-Aug 22-Aug
- Christian Arroyo (infielder, b. 1995, Florida)
- 2016: Richmond Flying Squirrels, Eastern League (AA) - 1 game 21-Aug
- 2022: Boston Red Sox, Major League Baseball - 1 game 2-Oct
- 2023: Boston Red Sox, Major League Baseball - 1 game 13-Apr
- Edwin Arroyo (infielder, b. 1990, Puerto Rico)
- 2019: Chicago Dogs, American Association (independent) - 1 game 1-Jun
- 2020: Chicago Dogs, American Association (independent) - 1 game 21-Jul
- 2022: Cleburne Railroaders, American Association (independent) - 1 game 10-Jul
- Luis Arroyo (pitcher, b. 1973, Puerto Rico)
- 2001: Somerset Patriots, Atlantic League (independent) - 2 games 3-Sep 3-Oct
- 2004: Bridgeport Bluefish, Atlantic League (independent) - 1 game 12-Sep
- Michael Arroyo (infielder, b. 2004, Colombia)
- 2023: Modesto Nuts, California League (Low-A) - 1 game 10-Aug
- Rafael Arroyo (catcher, b. 1982, California)
- 2005: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 27-Jun 29-Jun
- 2006: Hagerstown Suns, South Atlantic League (Low-A) - 2 games 26-Apr 15-Aug
- Xavier Arroyo (outfielder, b. 1984, Puerto Rico)
- 2005: Greensboro Grasshoppers, South Atlantic League (Low-A) - 1 game 9-Jul
- Aaron Arruda (first baseman, b. 1995, California)
- 2018: Vermont Lake Monsters, New York-Penn League (short-season) - 1 game 29-Jul
- J.T. Arruda (infielder, b. 1997, California)
- 2021: Fredericksburg Nationals, Low-A East - 1 game 15-Jun
- 2022: Fredericksburg Nationals, Carolina League (Low-A) - 1 game 23-Jun
- Erisbel Arruebarrena (infielder, b. 1990, Cuba)
- 2015: Tulsa Drillers, Texas League (AA) - 1 game 30-Jul
- Alejandro Arteaga (pitcher, b. 1994, Venezuela)
- 2014: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 23-Apr
- Erick Arteaga (pitcher, b. 1981, Venezuela)
- 2004: Lakewood BlueClaws, South Atlantic League (Low-A) - 1 game 3-Aug
- Francisco Arteaga (pitcher, b. 1981, Mexico)
- 2001: Jamestown Jammers, New York-Penn League (short-season) - 1 game 5-Sep
- Humberto Arteaga (infielder, b. 1994, Venezuela)
- 2018: Omaha Storm Chasers, Pacific Coast League (AAA) - 1 game 7-Aug
- Ivan Arteaga (pitcher, b. 1972, Venezuela)
- 1999: Elmira Pioneers, Northeast League (independent) - 1 game 17-Jul
- J.D. Arteaga (pitcher, b. 1974, Florida)
- 2000: Binghamton Mets, Eastern League (AA) - 1 game 8-Sep
- Josh Arteaga (infielder, b. 1980, Florida)
- 2002: Daytona Cubs, Florida State League (High-A) - 1 game 23-Aug
- 2005: Richmond Braves, International League (AAA) - 1 game 28-Aug
- 2006: Mississippi Braves, Southern League (AA) - 1 game 2-Sep
- 2007: Newark Bears, Atlantic League (independent) - 1 game 9-Jun
- Shane Arthurs (pitcher, b. 1979, Oklahoma)
- 2005: Long Island Ducks, Atlantic League (independent) - 1 game 17-Sep
- Omar Artsen (infielder, b. 1989, New York)
- 2014: Santa Fe Fuego, Pecos League (independent) - 1 game 21-Jul
- 2021: Lexington Legends, Atlantic League (independent) - 3 games 6-Aug 4-Sep 19-Sep
- Thomas Arvelo (infielder, b. 1973, Dominican Republic)
- 1996: Capital City Bombers, South Atlantic League (Low-A) - 1 game 29-Aug
- Rick Asadoorian (outfielder, b. 1980, Massachusetts)
- 2001: Augusta Greenjackets, South Atlantic League (Low-A) - 1 game 7-Aug
- Josh Asanovich (infielder, b. 1983, Arizona)
- 2004: Hudson Valley Renegades, New York-Penn League (short-season) - 1 game 4-Aug
- Enyerberth Ascanio (catcher, b. 2000, Venezuela)
- 2019: GCL Yankees West, Gulf Coast League (rookie) - 1 game 26-Aug g2
- Johnny Ascanio (infielder, b. 2003, Venezuela)
- Jose Ascanio (pitcher, b. 1985, Venezuela)
- 2003: GCL Braves, Gulf Coast League (rookie) - 1 game 26-Aug
- 2007: Atlanta Braves, Major League Baseball - 1 game 11-Sep
- Rayder Ascanio (infielder, b. 1996, Venezuela)
- 2019: Palm Beach Cardinals, Florida State League (High-A) - 2 games 11-May g1 11-May g2
- 2019: Springfield Cardinals, Texas League (AA) - 1 game 25-Jul
- 2021: Memphis Redbirds, Triple-A East - 1 game 23-Sep
- Yeison Asencio (outfielder, b. 1989, Dominican Republic)
- 2021: Dominican Republic, Americas Olympic Qualifier - 1 game 2-Jun
- Cody Asche (infielder, b. 1990, Missouri)
- 2013: Philadelphia Phillies, Major League Baseball - 1 game 31-Jul
- 2014: Philadelphia Phillies, Major League Baseball - 1 game 18-Aug
- 2015: Philadelphia Phillies, Major League Baseball - 1 game 30-Sep
- 2016: Lehigh Valley IronPigs, International League (AAA) - 1 game 30-May
- 2016: Philadelphia Phillies, Major League Baseball - 2 games 25-Sep 2-Oct
- 2018: Las Vegas 51s, Pacific Coast League (AAA) - 1 game 21-Aug
- Kirk Asche (outfielder, b. 1977, Illinois)
- 2000: Visalia Oaks, California League (High-A) - 1 game 2-Sep
- Mike Asche (outfielder, b. 1972, Illinois)
- Dalmiro Asencio (pitcher, b. 1984, Dominican Republic)
- 2001: Bristol Sox, Appalachian League (rookie) - 1 game 5-Aug
- Eudi Asencio (pitcher, b. 1999, Dominican Republic)
- 2019: GCL Braves, Gulf Coast League (rookie) - 2 games 9-Aug 20-Aug
- Fernando Asencio (outfielder, b. 1974)
- 1999: Waterbury Spirit, Northeast League (independent) - 1 game 20-Jun
- Jairo Asencio (pitcher, b. 1983, Dominican Republic)
- 2008: Mississippi Braves, Southern League (AA) - 1 game (as Luis Valdez) 14-Aug
- Miguel Asencio (pitcher, b. 1980, Dominican Republic)
- 2008: Portland Sea Dogs, Eastern League (AA) - 2 games 4-Aug 3-Sep
- Konnor Ash (pitcher, b. 1999, Michigan)
- Chris Ashby (outfielder, b. 1974, Arizona)
- 1998: Norwich Navigators, Eastern League (AA) - 1 game 2-Aug
- 2004: Albuquerque Isotopes, Pacific Coast League (AAA) - 1 game 10-Aug g1
- 2008: York Revolution, Atlantic League (independent) - 2 games 17-Sep 24-Sep
- Braxton Ashcraft (pitcher, b. 1999, Texas)
- 2021: Greensboro Grasshoppers, High-A East - 1 game 1-Jul
- Graham Ashcraft (pitcher, b. 1998, Alabama)
- 2021: Chattanooga Lookouts, Double-A South - 1 game 5-Aug
- 2022: Cincinnati Reds, Major League Baseball - 1 game 30-Sep
- Alec Asher (pitcher, b. 1991, Florida)
- 2015: Philadelphia Phillies, Major League Baseball - 1 game 30-Sep
- Billy Ashley (outfielder, b. 1970, Michigan)
- Nevin Ashley (catcher, b. 1984, Indiana)
- 2011: Durham Bulls, International League (AAA) - 1 game 5-Aug
- 2014: Indianapolis Indians, International League (AAA) - 1 game 25-May
- Micah Ashman (pitcher, b. 2002, Utah)
- Shaun Ashman (outfielder, b. 1980, Texas)
- 2005: Calgary Vipers, Northern League (independent) - 1 game 12-Aug
- Ryan Ashner (pitcher, b. 1983, Kansas)
- 2008: River City Rascals, Frontier League (independent) - 1 game 16-Aug
- Josh Ashton (infielder, b. 1982, New Mexico)
- 2007: Amarillo Dillas, United League (independent) - 2 games 10-Aug 13-Aug
- 2008: Amarillo Dillas, United League (independent) - 1 game 13-Aug
- Muhammad Asif (pitcher, b. 1986, Pakistan)
- 2016: Pakistan, World Baseball Classic - 1 game 23-Sep
- Albertson Asigen (outfielder, b. 2001, Dominican Republic)
- 2024: Kannapolis Cannon Ballers, Carolina League (Low-A) - 1 game 11-Aug g2
- Keyshawn Askew (pitcher, b. 2000, Georgia)
- 2023: Bowling Green Hot Rods, South Atlantic League (High-A) - 1 game 21-Jun
- 2024: Montgomery Biscuits, Southern League (AA) - 1 game 18-Jun
- Zac Asman (infielder, b. unknown)
- 2014: Taos Blizzard, Pecos League (independent) - 1 game 21-Jul
- Bryant Asnicar (pitcher, b. 1988)
- 2011: New York Federals, Can-Am League (independent) - 1 game 23-Jun
- Jason Aspito (outfielder, b. 1979, Illinois)
- 2007: York Revolution, Atlantic League (independent) - 2 games 21-Jul 26-Aug
- 2008: York Revolution, Atlantic League (independent) - 2 games 20-Sep 24-Sep
- 2009: York Revolution, Atlantic League (independent) - 2 games 31-Aug 7-Sep
- Avelino Asprilla (infielder, b. 1981, Pennsylvania)
- 2003: Lynchburg Hillcats, Carolina League (High-A) - 1 game 5-Apr
- 2006: Lakewood BlueClaws, South Atlantic League (Low-A) - 4 games 26-Jun 6-Sep 14-Sep 15-Sep
- Javier Assad (pitcher, b. 1997, Mexico)
- 2017: Eugene Emeralds, Northwest League (short-season) - 1 game 29-Jul
- Nick Asselin (pitcher, b. 1985, New Hampshire)
- 2008: Staten Island Yankees, New York-Penn League (short-season) - 1 game 5-Sep
- 2009: Nashua Defenders, Can-Am League (independent) - 1 game 13-Aug
- 2009: New Jersey Jackals, Can-Am League (independent) - 1 game 1-Sep
- 2010: New Jersey Jackals, Can-Am League (independent) - 1 game 10-Jun
- Paul Assenmacher (pitcher, b. 1960, Michigan)
- 1993: New York Yankees, American League (MLB) - 2 games 22-Sep 3-Oct
- 1998: Cleveland Indians, American League (MLB) - 1 game 9-Aug
- Pedro Astacio (pitcher, b. 1968, Dominican Republic)
- 2006: Washington Nationals, Major League Baseball - 1 game 22-Sep
- Barrett Astin (pitcher, b. 1991, Arkansas)
- 2016: Peoria Javelinas, Arizona Fall League - 2 games 11-Oct 14-Oct
- Wayne Astrauskas (catcher, b. 1981, Illinois)
- 2005: Mid-Missouri Mavericks, Frontier League (independent) - 1 game 20-Aug
- Wilfred Astudillo (catcher, b. 2000, Venezuela)
- Willfrann Astudillo (catcher, b. 2001, Venezuela)
- 2021: Dunedin Blue Jays, Low-A Southeast - 1 game 28-Jul
- Willians Astudillo (catcher/infielder, b. 1991, Venezuela)
- 2014: Lakewood BlueClaws, South Atlantic League (Low-A) - 3 games 23-Apr 5-Aug 14-Aug
- 2018: Rochester Red Wings, International League (AAA) - 1 game 2-Aug
- 2018: Minnesota Twins, Major League Baseball - 1 game 19-Sep
- 2019: Pensacola Blue Wahoos, Southern League (AA) - 1 game 15-Aug
- 2022: Jacksonville Jumbo Shrimp, International League (AAA) - 2 games 30-Aug 22-Sep
- Carlos Asuaje (infielder, b. 1991, Venezuela)
- 2018: San Diego Padres, Major League Baseball - 2 games 4-Aug 23-Aug
- Luis Asuncion (outfielder, b. 1997, Dominican Republic)
- 2017: Tri-City Dust Devils, Northwest League (short-season) - 2 games 4-Aug 5-Aug
- Scott Atchison (pitcher, b. 1976, Texas)
- 2013: New York Mets, Major League Baseball - 2 games 9-Sep 13-Sep
- 2014: Cleveland Indians, Major League Baseball - 1 game 26-Aug
- Javier Atencio (pitcher, b. 2001, Venezuela)
- 2023: St. Lucie Mets, Florida State League (Low-A) - 2 games 28-Apr 11-May
- Jamie Athas (infielder, b. 1979, Massachusetts)
- Austin Athmann (catcher, b. 1995, Minnesota)
- 2017: West Michigan Whitecaps, Midwest League (Low-A) - 1 game 21-Aug
- Garrett Atkins (infielder, b. 1979, California)
- 2005: Colorado Rockies, Major League Baseball - 1 game 2-Oct
- 2007: Colorado Rockies, Major League Baseball - 1 game 23-Apr
- 2009: Colorado Rockies, Major League Baseball - 1 game 21-Aug
- Mitch Atkins (pitcher, b. 1985, North Carolina)
- 2007: Tennessee Smokies, Southern League (AA) - 1 game 3-Sep
- 2008: Iowa Cubs, Pacific Coast League (AAA) - 1 game 29-Jul
- Justin Atkinson (infielder, b. 1993, British Columbia)
- 2013: Vancouver Canadians, Northwest League (short-season) - 2 games 20-Aug 21-Aug
- 2014: Lansing Lugnuts, Midwest League (Low-A) - 1 game 24-Aug
- Neil Atkinson (pitcher, b. 1971)
- 1995: Wilmington Blue Rocks, Carolina League (High-A) - 1 game 31-Aug
- Tom Atlee (pitcher, b. 1979, Texas)
- 2007: New Jersey Jackals, Can-Am League (independent) - 2 games 7-Sep 9-Sep
- 2008: New Jersey Jackals, Can-Am League (independent) - 1 game 24-Aug
- Aaron Attaway (infielder, b. 1992, North Carolina)
- 2014: Bluefield Blue Jays, Appalachian League (rookie) - 1 game 19-Aug
- 2016: Dunedin Blue Jays, Florida State League (High-A) - 1 game 24-Aug
- Kyle Attl (infielder, b. 1991, California)
- 2013: Auburn Doubledays, New York-Penn League (short-season) - 1 game 2-Aug
- Andy Atwood (infielder, b. 1996, Washington)
- 2022: Winston-Salem Dash, South Atlantic League (High-A) - 1 game 31-Aug
- 2024: Glacier Range Riders, Pioneer League (independent) - 2 games 6-Jul 7-Jul
- Michael Aubrey (first baseman, b. 1982, Louisiana)
- 2003: Lake County Captains, South Atlantic League (Low-A) - 1 game 1-Aug
- 2007: Akron Aeros, Eastern League (AA) - 2 games 24-Aug g1 12-Sep
- 2009: Baltimore Orioles, Major League Baseball - 1 game 4-Oct
- 2011: Syracuse Chiefs, International League (AAA) - 3 games 23-Apr g1 23-Apr g2 3-Jul
- Rich Aude (first baseman, b. 1971, California)
- 1993: Pittsburgh Pirates, National League (MLB) - 1 game 11-Sep
- 1997: Syracuse SkyChiefs, International League (AAA) - 1 game 2-Aug
- Mason Auer (outfielder, b. 2001, Missouri)
- 2022: Charleston RiverDogs, Carolina League (Low-A) - 1 game 22-Jun
- 2022: Bowling Green Hot Rods, South Atlantic League (High-A) - 1 game 16-Aug
- 2022: Mesa Solar Sox, Arizona Fall League - 3 games 12-Oct 14-Oct 15-Oct
- 2024: Montgomery Biscuits, Southern League (AA) - 1 game 18-Jun
- Brett Auerbach (catcher/infielder, b. 1998, California)
- 2021: Eugene Emeralds, High-A West - 1 game 13-Jul
- Cameron Aufderheide (pitcher, b. 1996, California)
- 2022: Joliet Slammers, Frontier League (independent) - 1 game 6-Jul
- Mike Augliera (pitcher, b. 1990, New Jersey)
- 2012: Lowell Spinners, New York-Penn League (short-season) - 1 game 25-Aug
- Phillippe Aumont (pitcher, b. 1989, Quebec)
- 2011: Lehigh Valley IronPigs, International League (AAA) - 2 games 5-Aug 16-Sep
- 2012: Lehigh Valley IronPigs, International League (AAA) - 1 game 22-Jul
- 2012: Philadelphia Phillies, Major League Baseball - 1 game 29-Aug
- 2013: Lehigh Valley IronPigs, International League (AAA) - 1 game 2-Sep
- 2014: Lehigh Valley IronPigs, International League (AAA) - 1 game 17-Aug
- Austin Aune (utility, b. 1993, Texas)
- 2014: Staten Island Yankees, New York-Penn League (short-season) - 1 game 31-Jul
- Rich Aurilia (infielder, b. 1971, New York)
- 1995: Phoenix Firebirds, Pacific Coast League (AAA) - 1 game 13-Aug
- 1997: San Francisco Giants, National League (MLB) - 1 game 31-Aug
- 2000: San Francisco Giants, Major League Baseball - 1 game 2-Sep
- 2001: San Francisco Giants, Major League Baseball - 1 game 24-Aug
- 2004: San Diego Padres, Major League Baseball - 2 games 8-Aug 25-Aug
- Brad Ausmus (catcher, b. 1969, Connecticut)
- 1994: San Diego Padres, National League (MLB) - 2 games 17-Jul 22-Jul g1
- 1995: San Diego Padres, National League (MLB) - 1 game 24-Aug
- 1998: Houston Astros, National League (MLB) - 1 game 6-Sep
- 1999: Detroit Tigers, American League (MLB) - 2 games 24-Jul 19-Sep
- 2000: Detroit Tigers, Major League Baseball - 1 game 22-Jul day
- 2001: Houston Astros, Major League Baseball - 1 game 27-Jul
- 2008: Houston Astros, Major League Baseball - 1 game 22-Aug
- David Austen (pitcher, b. 1981, Florida)
- 2007: Arkansas Travelers, Texas League (AA) - 1 game 8-Aug
- Cade Austin (pitcher, b. 2001, South Carolina)
- 2024: Tampa Tarpons, Florida State League (Low-A) - 2 games 1-May 17-Aug
- Channing Austin (pitcher, b. 2001, New York)
- 2024: St. Lucie Mets, Florida State League (Low-A) - 1 game 3-Sep
- Chase Austin (infielder, b. 1987, North Carolina)
- 2009: Jamestown Jammers, New York-Penn League (short-season) - 1 game 20-Jul
- Jake Austin (outfielder, b. 1970)
- 1994: Salem Buccaneers, Carolina League (High-A) - 1 game 7-Aug
- Jamal Austin (outfielder, b. 1990, Georgia)
- 2015: New Jersey Jackals, Can-Am League (independent) - 3 games 19-Jun 2-Aug 6-Aug
- 2015: Sussex County Miners, Can-Am League (independent) - 1 game 18-Aug
- James Austin (pitcher, b. 1963, Virginia)
- 1992: Milwaukee Brewers, American League (MLB) - 1 game 14-Aug g1
- Jay Austin (outfielder, b. 1990, Georgia)
- Richard Austin (outfielder, b. 1977, New York)
- 2005: Fargo-Moorhead RedHawks, Northern League (independent) - 1 game 8-Aug
- Scott Austin (catcher, b. 1992, North Carolina)
- 2016: Winston-Salem Dash, Carolina League (High-A) - 1 game 28-May
- Tyler Austin (utility, b. 1991, Georgia)
- 2011: Staten Island Yankees, New York-Penn League (short-season) - 2 games 31-Aug 9-Sep
- 2013: Trenton Thunder, Eastern League (AA) - 1 game 5-Sep
- 2014: Trenton Thunder, Eastern League (AA) - 1 game 27-Jul
- 2014: Scottsdale Scorpions, Arizona Fall League - 2 games 8-Oct 9-Oct
- 2016: New York Yankees, Major League Baseball - 2 games 13-Aug 1-Oct
- 2017: New York Yankees, Major League Baseball - 1 game 11-Sep
- 2018: New York Yankees, Major League Baseball - 1 game 25-Apr
- 2018: Rochester Red Wings, International League (AAA) - 1 game 2-Aug
- 2018: Minnesota Twins, Major League Baseball - 1 game 19-Sep
- Miguel Ausua (pitcher, b. 1996, Puerto Rico)
- 2022: Ponce Leones, Liga Clemente (winter) - 1 game 2-Dec
- Luis Avalo (catcher/first base, b. 1998, Dominican Republic)
- 2019: Rocky Mountain Vibes, Pioneer League (rookie) - 1 game 6-Jul
- Gilbert Avalos (infielder, b. 1973, Texas)
- 1995: Rockford Cubbies, Midwest League (Low-A) - 1 game 18-Aug
- Drew Avans (outfielder, b. 1996, Alabama)
- 2019: Tulsa Drillers, Texas League (AA) - 1 game 22-Jul
- Chandler Avant (infielder, b. 1995, Alabama)
- 2018: Brooklyn Cyclones, New York-Penn League (short-season) - 2 games 18-Jun 1-Jul
- Marlon Avea (catcher, b. 1993, Nicaragua)
- 2015: Quad Cities River Bandits, Midwest League (Low-A) - 1 game 3-Sep
- Abiatal Avelino (infielder, b. 1995, Dominican Republic)
- 2014: Charleston RiverDogs, South Atlantic League (Low-A) - 1 game 23-Apr
- 2016: Trenton Thunder, Eastern League (AA) - 4 games 2-Aug 20-Aug 8-Sep 10-Sep
- 2018: Trenton Thunder, Eastern League (AA) - 1 game 20-Jun
- 2018: Scranton/Wilkes-Barre RailRiders, International League (AAA) - 1 game 2-Aug
- 2019: Sacramento RiverCats, Pacific Coast League (AAA) - 1 game 17-Sep
- 2022: Tulsa Drillers, Texas League (AA) - 1 game 5-Aug
- Bruce Aven (outfielder, b. 1972, Texas)
- 1997: Buffalo Bisons, American Association (AAA) - 1 game 9-Aug g1
- 1997: Cleveland Indians, American League (MLB) - 1 game 27-Aug
- Elvis Avendano (pitcher, b. 1983, Venezuela)
- Robert Averette (pitcher, b. 1976, Alabama)
- 2006: Somerset Patriots, Atlantic League (independent) - 1 game 16-Aug
- Matt Avery (pitcher, b. 1983, Virginia)
- 2009: Harrisburg Senators, Eastern League (AA) - 1 game 11-Apr
- Steve Avery (pitcher, b. 1970, Michigan)
- 1992: Atlanta Braves, National League (MLB) - 1 game 31-Aug g1
- 1996: Atlanta Braves, National League (MLB) - 1 game 14-Sep
- 1997: Boston Red Sox, American League (MLB) - 1 game 16-Sep g2
- Xavier Avery (outfielder, b. 1990, Georgia)
- 2009: Delmarva Shorebirds, South Atlantic League (Low-A) - 1 game 10-Apr
- 2010: Frederick Keys, Carolina League (High-A) - 1 game 7-Aug
- 2015: Rochester Red Wings, International League (AAA) - 1 game 7-Sep
- 2016: Norfolk Tides, International League (AAA) - 2 games 30-May 21-Aug
- 2017: Gwinnett Braves, International League (AAA) - 1 game 26-Jul
- Alex Avila (catcher, b. 1987, Florida)
- 2009: Erie SeaWolves, Eastern League (AA) - 1 game 29-Jul
- 2009: Detroit Tigers, Major League Baseball - 1 game 6-Sep
- 2010: Detroit Tigers, Major League Baseball - 2 games 17-Aug
- 2011: Detroit Tigers, Major League Baseball - 1 game 2-Sep
- 2018: Arizona Diamondbacks, Major League Baseball - 1 game 19-Aug
- 2021: Washington Nationals, Major League Baseball - 1 game 6-Sep
- Andres Avila (pitcher, b. 1990, Mexico)
- 2012: Vermont Lake Monsters, New York-Penn League (short-season) - 1 game 23-Aug
- Kliubert Avila (catcher, b. 2003, Venezuela)
- 2023: Clearwater Threshers, Florida State League (Low-A) - 2 games 3-Jul 9-Jul
- Luis Avila (pitcher, b. 2003, Venezuela)
- Nick Avila (pitcher, b. 1997, California)
- 2023: Sacramento RiverCats, Pacific Coast League (AAA) - 1 game 9-Aug
- Rob Avila (catcher, b. 1978, California)
- Pedro Avila (pitcher, b. 1997, Venezuela)
- 2018: Lake Elsinore Storm, California League (High-A) - 1 game 10-Aug
- Rolo Avila (outfielder, b. 1973, California)
- 1998: Atlantic City Surf, Atlantic League (independent) - 3 games 4-Jul 5-Jul 12-Jul
- 1999: Newark Bears, Atlantic League (independent) - 3 games 31-May 21-Jul 6-Sep g1
- 2000: Newark Bears, Atlantic League (independent) - 3 games 6-Jul 7-Aug 6-Sep
- 2003: Bridgeport Bluefish, Atlantic League (independent) - 1 game 3-Aug
- 2005: Bridgeport Bluefish, Atlantic League (independent) - 1 game 15-Jun
- Luis Avilan (pitcher, b. 1989, Venezuela)
- 2014: Atlanta Braves, Major League Baseball - 1 game 20-Apr
- 2019: New York Mets, Major League Baseball - 2 games 13-Aug 20-Sep
- Guillermo Aviles (first base/outfield, b. 1993, Cuba)
- 2017: Cuban National Team, Can-Am League (independent) - 1 game 22-Jun
- Luis Aviles (utility, b. 1995, Florida)
- 2015: Wisconsin Timber Rattlers, Midwest League (Low-A) - 2 games 31-Aug 2-Sep
- 2019: Biloxi Shuckers, Southern League (AA) - 2 games 10-Sep 11-Sep
- 2021: Rocket City Trash Pandas, Double-A South - 2 games 23-Jul 5-Aug
- 2022: Jacksonville Jumbo Shrimp, International League (AAA) - 1 game 22-Sep
- Mike Aviles (infielder, b. 1981, New York)
- 2014: Cleveland Indians, Major League Baseball - 1 game 26-Aug
- 2015: Cleveland Indians, Major League Baseball - 1 game 20-Aug
- Robbie Aviles (pitcher, b. 1991, New York)
- 2014: Lake County Captains, Midwest League (Low-A) - 1 game 24-Aug
- Phil Avlas (catcher, b. 1982, California)
- 2002: Missoula Osprey, Pioneer League (rookie) - 2 games 5-Aug 10-Aug
- 2004: Lancaster JetHawks, California League (High-A) - 1 game 7-Aug
- 2007: Mobile BayBears, Southern League (AA) - 1 game 17-Aug
- Dylan Axelrod (pitcher, b. 1985, California)
- 2010: Winston-Salem Dash, Carolina League (High-A) - 1 game 7-Aug
- Josh Axelson (pitcher, b. 1978, Michigan)
- 2006: Camden Riversharks, Atlantic League (independent) - 1 game 16-Sep
- John Axford (pitcher, b. 1983, Ontario)
- 2009: Nashville Sounds, Pacific Coast League (AAA) - 1 game 24-Aug
- 2010: Milwaukee Brewers, Major League Baseball - 1 game 29-Sep g1
- Abraham Ayala (catcher/first base, b. 1980, Puerto Rico)
- 2002: Brooklyn Cyclones, New York-Penn League (short-season) - 1 game 30-Aug g2
- 2005: Newark Bears, Atlantic League (independent) - 2 games 24-Jul 24-Aug
- 2006: Sussex Skyhawks, Can-Am League (independent) - 2 games 30-Jun 9-Jul
- Albert Ayala (pitcher, b. 1986)
- 2008: Shreveport Sports, American Association (independent) - 1 game 12-Aug
- 2010: Worcester Tornadoes, Can-Am League (independent) - 1 game 16-Aug
- Alex Ayala (pitcher, b. 2001, Panama)
- 2022: Mesa Solar Sox, Arizona Fall League - 1 game 13-Oct
- Alexander Ayala (infielder, b. 1981)
- 2017: Trois-Rivieres Aigles, Can-Am League (independent) - 1 game 10-Aug
- Bobby Ayala (pitcher, b. 1969, California)
- 1994: Seattle Mariners, American League (MLB) - 1 game 23-Jul g2
- Cesar Ayala (pitcher, b. 2003, Venezuela)
- 2023: FCL Blue Jays, Florida Complex League (rookie) - 1 game 22-Aug
- Drake Ayala (utility, b. unknown)
- 2021: Salina Stockade, Pecos League (independent) - 1 game 21-Jul
- Elliott Ayala (infielder, b. 1978, Puerto Rico)
- Luis Ayala (pitcher, b. 1978, Mexico)
- 2004: Montreal Expos, Major League Baseball - 1 game 2-Oct
- 2005: Washington Nationals, Major League Baseball - 1 game 4-Jul
- 2007: Washington Nationals, Major League Baseball - 2 games 23-Sep 26-Sep
- 2008: Washington Nationals, Major League Baseball - 2 games 22-Jun 27-Jul
- 2008: New York Mets, Major League Baseball - 3 games 22-Aug 10-Sep 23-Sep
- 2011: New York Yankees, Major League Baseball - 1 game 30-Sep
- 2012: Baltimore Orioles, Major League Baseball - 1 game 31-Jul
- Luis Ayala (outfielder, b. 1995, Venezuela)
- 2018: Myrtle Beach Pelicans, Carolina League (High-A) - 1 game 29-Aug
- Odannys Ayala (outfielder, b. 1980, Puerto Rico)
- 2001: Burlington Bees, Midwest League (Low-A) - 1 game 28-Jul
- 2005: Winnipeg Goldeyes, Northern League (independent) - 1 game 9-Aug
- Roberto Ayala (pitcher, b. 1981, Venezuela)
- 2001: Princeton Devil Rays, Appalachian League (rookie) - 1 game 5-Aug
- Erick Aybar (infielder, b. 1984, Dominican Republic)
- 2002: Provo Angels, Pioneer League (rookie) - 2 games 17-Aug g1 17-Aug g2
- 2009: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 26-Aug
- 2010: Los Angeles Angels of Anaheim, Major League Baseball - 1 game 22-Aug
- 2013: Los Angeles Angels of Anaheim, Major League Baseball - 2 games 12-Aug 23-Aug
- 2016: Atlanta Braves, Major League Baseball - 1 game 3-May
- Manny Aybar (pitcher, b. 1972, Dominican Republic)
- 1997: St. Louis Cardinals, National League (MLB) - 1 game 4-Aug
- 1998: Memphis Redbirds, Pacific Coast League (AAA) - 1 game 26-Aug
- 2005: New York Mets, Major League Baseball - 1 game 10-Jun
- Nicandro Aybar (infielder, b. 2004, Dominican Republic)
- 2024: FCL Rays, Florida Complex League (rookie) - 2 games 22-Jun 22-Jul
- Willy Aybar (infielder, b. 1983, Dominican Republic)
- 2001: Wilmington Waves, South Atlantic League (Low-A) - 1 game 6-Aug
- 2003: Vero Beach Dodgers, Florida State League (High-A) - 1 game 28-Aug
- 2009: Tampa Bay Rays, Major League Baseball - 1 game 19-Jun
- Yoan Aybar (outfielder, then pitcher, b. 1997, Dominican Republic)
- 2016: Lowell Spinners, New York-Penn League (short-season) - 1 game 8-Aug
- 2017: Lowell Spinners, New York-Penn League (short-season) - 1 game 22-Jul
- 2022: Charlotte Knights, International League (AAA) - 1 game 22-Sep
- Cole Ayers (pitcher, b. 1999, Ohio)
- Brian Aylor (outfielder, b. 1974, Oklahoma)
- 1998: Greensboro Bats, South Atlantic League (Low-A) - 1 game 29-Aug
- Scott Ayotte (outfielder, b. 1973, Michigan)
- 1996: Oneonta Yankees, New York-Penn League (short-season) - 1 game 17-Aug
- Bob Ayrault (pitcher, b. 1966, California)
- 1992: Philadelphia Phillies, National League (MLB) - 1 game 22-Aug
- Joe Ayrault (catcher, b. 1971, Michigan)
- 1997: Richmond Braves, International League (AAA) - 1 game 20-Jul
- Karim Ayubi (outfielder, b. 2003, Curacao)
- 2024: FCL Red Sox, Florida Complex League (rookie) - 1 game 7-May
- Javier Azcona (infielder, b. 1991, Dominican Republic)
- 2011: Connecticut Tigers, New York-Penn League (short-season) - 1 game 21-Aug
- Maikel Azcuy (infielder, b. 1982, Cuba)
- 2016: Great Britain, World Baseball Classic - 1 game 23-Sep
- Jose Azocar (outfielder, b. 1996, Venezuela)
- 2017: Lakeland Flying Tigers, Florida State League (High-A) - 1 game 28-May
- 2019: Mesa Solar Sox, Arizona Fall League - 3 games 15-Oct 18-Oct 19-Oct
- 2024: Syracuse Mets, International League (AAA) - 1 game 20-Sep
- Alexeis Azuaje (infielder, b. 2002, Venezuela)
- Jesus Azuaje (infielder, b. 1973, Venezuela)
- 1996: Binghamton Mets, Eastern League (AA) - 2 games 9-Aug 25-Aug
- 1997: Binghamton Mets, Eastern League (AA) - 1 game 20-Jul
- 2001: Camden Riversharks, Atlantic League (independent) - 1 game 7-Sep
- 2003: Camden Riversharks, Atlantic League (independent) - 3 games 25-Jul 20-Aug 17-Sep
- Jesus Azuaje (infielder, b. 1997, Arizona)
- 2017: Williamsport Crosscutters, New York-Penn League (short-season) - 1 game 12-Aug g2
- 2019: Albuquerque Isotopes, Pacific Coast League (AAA) - 1 game 12-Jul
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