Two Grand Slams in a Game on Batting Lefty One Batting Righty On this day, in 2003 switch-hitting Bill Mueller became the first player in Major League history to hit two grand slams in a game, one from each side of the plate. July 29, 2003 Sport: Baseball Trivia What Are the Five Events That Make Up the Modern Olympic Pentathon? Which Nations Won the Gold, Silver and Bronze Medals the Last Time Baseball Was an Olympic Sport? sports in this article Baseball tags in this article Fan SportsEngine