<P> Every team which had a player hit two grand slams won their milestone games . These games have resulted in other single - game MLB records being set due to the extreme offensive performance . Lazzeri , for example , proceeded to hit a third home run in the game and finished with a total of eleven runs batted in , an American League record . Fernando Tatís became the only player to hit two grand slams in the same inning , when he attained the milestone , slugging two in the third inning for the St. Louis Cardinals on April 23 , 1999 . In achieving the feat , he also set a new major league record with eight runs batted in a single inning . </P>
<P> Every team which had a player hit two grand slams won their milestone games . These games have resulted in other single - game MLB records being set due to the extreme offensive performance . Lazzeri , for example , proceeded to hit a third home run in the game and finished with a total of eleven runs batted in , an American League record . Fernando Tatís became the only player to hit two grand slams in the same inning , when he attained the milestone , slugging two in the third inning for the St. Louis Cardinals on April 23 , 1999 . In achieving the feat , he also set a new major league record with eight runs batted in a single inning . </P>
who hit two grand slams in the same inning
who hit two grand slams in the same inning
Fernando Tatís
Fernando Tatís