10. Tie: 58
Mark McGwire - St. Louis Cardinals, 1997
Hank Greenberg - Detroit Tigers, 1938
Jimmie Foxx - Philadelphia Phillies, 1932
9. Babe Ruth, 59 - New York Yankees, 1921
8. Babe Ruth, 59 - New York Yankees, 1927
7. Roger Maris, 60 - New York Yankees, 1961
6. Sammy Sosa, 61 - Chicago Cubs, 1999
5. Sammy Sosa, 63 - Chicago Cubs, 2001
4. Mark McGwire, 65 - St. Louis Cardinals, 1999
3 . Sammy Sosa, 66- Chicago Cubs, 1998
2. Mark McGwire, 70 - St. Louis Cardinals, 1998
1. Barry Bonds, 73 - San Francisco Giants, 2001
According to the Major League Baseball
* denotes active player
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