Mark McGwire is a former major league baseball player.
Mark McGwire appeared in the episode, "Up the Down Steroid", in which he presented the award at the Special Olympics, along with Barry Bonds and Jason Giambi. His role in the episode is minor and he has yet to make another appearance.
thumb|Mark McGwire Mark David McGwire (1 de octubre de 1963), jugador de béisbol estadounidense, que en 1998, protagonizó uno de los récords más celebrados en la historia de este deporte al conseguir en una misma temporada 70 home runs.
Mark David McGwire (b. October 1, 1963) is an American former professional baseball player. He voiced himself in the season 11 episode "Brother's Little Helper".
Mark David McGwire (born October 1, 1963 in Pomona, California) is a former first baseman in Major League Baseball who played from 1986 through 2001. Mark McGwire has been hired as a batting coach by manager Tony LaRussa of the St. Louis Cardinals for 2010.