Robin Ventura is the only player in MLB history to hit a grand slam in each game of a doubleheader. He accomplished the feat in a twin bill against the Brewers at Shea Stadium May 20, 1999.

Robin Ventura is the only player in MLB history to hit a grand slam in each game of a doubleheader. He accomplished the feat in a twin bill against the Brewers at Shea Stadium May 20, 1999.