 When they did this, a little bit of info from Fox Sports. Your Mall of America Studio Sports Update. On this day in Twins history, we'll take you back to July 18, 1962, when the Twins hit two grand slams in the same inning. Bob Allison and Harmon Killebrew were the two hitters that would help Minnesota become the first AL team to hit two grand slams in the same inning as the Twins went on to top the Cleveland Indians at the Met 14-3.