In 10 years for the Oakland A's Reggie Jackson hit 269 home runs.
Oakland athletics
The Oakland Athletics single season home run record was broken by Mark McGwire. McGwire belted 57 home runs in the 1997 season. Mark McGwire also holds the all-time home run record for the Oakland Athletics, in his time as an Athletic, he hit 368 home runs. The previous record holder was Jimmie Foxx.
In MLB, Mark McGwire had 34 home runs for the Oakland Athletics and 24 home runs for the St. Louis Cardinals in 1997.
Jose Canseco of the 1988 Oakland Athletics with 42 home runs and 40 stolen bases.
Mark McGwire with 405, 159 with the St. Louis Cardinals and 246 with the Oakland Athletics.
Reggie Jackson Home Runs by TeamIn 21 Major League seasons, Reggie Jackson hit the most home runs with the Oakland Athletics. Jackson hit 269 career home runs with Oakland in 10 seasons. In 5 years with the California Angels he hit 123 home runs, and in 5 years with the New York Yankees he hit 144. In his single season with the Baltimore Orioles Jackson hit 27 home runs.
Both teams: 13 by the Oakland Athletics and San Francisco Giants in the 1989 WS. One team: 9 by the Oakland Athletics in the 1989 WS. Player: 4 by Willie Aikens of the Kansas City Royals in the 1980 WS.
Since the Athletics moved to Oakland, they have played in 6 World Series (1972, 1973, 1974, 1988, 1989, 1990). The only Athletics player to have hit three or more home runs in any of those six World Series was catcher Gene Tenace who hit 4 in the 1972 World Series against the Cincinnati Reds.
Mark McGwire with 58. He hit 34 for the Oakland Athletics and then was traded to the St. Louis Cardinals where he hit another 24.
The MLB National League rookie home run record is jointly held by Wally Berger, who knocked 38 out of the park in his first season with the Boston Braves in 1930, and by Frank Robinson, who matched that feat in his debut with the Cincinatti Reds in 1956. Berger was 25 when he set the mark, older than the average rookie. Robinson was 21.
In 2010, Jeremy Hermida played in 21 games for the Oakland Athletics, batting in all of them. He had 64 at bats, getting 16 hits, for a .250 batting average, with 2 runs batted in. He was walked 4 times. He struck out 13 times. He hit 4 doubles, 0 triples, and 1 home runs.