Mark McGwire: A Season for the Ages He's 6'5, and roughly 250lbs, and for the most part he is about as average as you or me. Almost except for one major thing, he is the record holder of the most prestigious record in all of pro sports. His name is Mark McGwire and the record is his 70 homeruns, shattering the old record held by the Minnesota native named Roger Maris. On the Major League Baseball's final day of the season Mark McGwire hit two mammoth homeruns to give him 70 on the year, an astonishing 1 home run in every 7.3 at bats. Mark started this quest for the record early in spring training, sett