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According to CNN and AP, Mark McGwire admitted on Jan. 11, 2010, to being on steroids when he broke Roger Maris' home run record in 1998.
He broke Mark Spitz record of 7 gold medals.
Mark McGwire played for the St. Louis Cardinals in 1998 when he broke the single-season home run record of 61 held by Roger Maris. He would finish the season with 70, a record that has since been broken by Barry Bonds, who hit 73 in 2001.
In 1998, Mark McGwire broke Maris' record by nine home runs. McGwire hit 70 and Maris hit 61.
Barry Bonds broke the record in the 20 century.