Mark McGwire hit his first home run on August 25, 1986, in Detroit, off Tigers pitcher Walt Terell.
In 1998, Mark McGwire broke Maris' record by nine home runs. McGwire hit 70 and Maris hit 61.
August 8, 1997 off of Mark Leiter of the Philadelphia Phillies.
Your Answer: 3Did you know:Mark McGwire played his first full season in 1987 and hit 49 home runs.
Mark McGwire
mark mcgwire
Mark McGwire hit 583 career hr's.
Mark McGwire hit 583 home runs during his career.
Mark McGwire hit 1 home run off California Angels pitcher Bert Blyleven on August 14, 1992.
Mark McGwire got his first hit on August 21, 1986, in the top of the 2nd inning, off Yankees pitcher Tommy John at Yankees Stadium.
Mark McGwire hit 70 home runs in 1998.
He hit it against the Colorado Rockies in 1997
454 feet according to http://www.baseball-almanac.com/charts/mcgwire/mark_mcgwire_home_runs.shtml He hit a 538 ft bomb of of Randy Johnson the same year Andres Gallarraga hit his 529 ft. upper deck grand slam at Pro Player Stadium against the Marlins.