Mark McGwire hit 1 home run off California Angels pitcher Bert Blyleven on August 14, 1992.
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In 1998, Mark McGwire broke Maris' record by nine home runs. McGwire hit 70 and Maris hit 61.
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.
Mark McGwire hit 583 home runs during his career.
Roger Maris (61)
mark mcgwire