A
- Andy Abad, IF, 2001
- Glenn Abbott, P, 1973-1976
- Kurt Abbott, IF, 1993, 1998
- Al Aber, P, 1957
- Tal Abernathy, P, 1942-1944
- Jeremy Accardo, P, 2012
- Merito Acosta, OF, 1918
- Mark Acre, P, 1994-1997
- Dick Adams, IF, 1947
- Mike Adams, OF, 1978
- Willie Adams, P, 1918-1919
- Willie Adams, P, 1996-1997
- Dick Adkins, IF, 1942
- Troy Afenir, C, 1990-1991
- Jack Aker, P, 1964-1968
- Darrel Akerfelds, P, 1986
- Mike Aldrete, OF, 1993-1995
- Gary Alexander, C, 1978
- Matt Alexander, OF, 1975-1977
- Bob Allen, OF, 1919
- Brandon Allen, IF, 2011-2012
- Dick Allen, IF, 1977
- Dana Allison, P, 1991
- Bill Almon, IF, 1983-1984
- Felipe Alou, OF, 1970-1971
- Jesús Alou, OF, 1973-1974
- Matty Alou, OF, 1972
- Dell Alston, OF, 1978
- George Alusik, OF, 1962-1964
- Brant Alyea, OF, 1972
- Wayne Ambler, IF, 1937-1939
- Walter Ancker, P, 1915
- Brett Anderson, P, 2009-2012
- Dwain Anderson, IF, 1971-1972
- Walter Anderson, P, 1917-1919
- Elbert Andrews, P, 1925
- Mike Andrews, IF, 1973
- Joaquín Andújar, P, 1986-1987
- Kevin Appier, P, 1999-2000
- Fred Applegate, P, 1904
- Fred Archer, P, 1936-1937
- Jim Archer, P, 1961-1962
- Marcos Armas, IF, 1993
- Tony Armas, OF, 1977-1982
- Harry Armbruster, OF, 1906
- George Armstrong, C, 1946
- Howard Armstrong, P, 1911
- Larry Arndt, IF, 1989
- Orie Arntzen, P, 1943
- Fernando Arroyo, P, 1982-1986
- Joe Astroth, C, 1945-1956
- Keith Atherton, P, 1983-1986
- Tommy Atkins, P, 1909-1910
- Joe Azcue, C, 1962-1963
Read more about this topic: Oakland Athletics All-time Roster