ST. LOUIS, MO (KFVS) - Many Cardinals fans will remember it well.
Tuesday, April 23 is the 20th anniversary of Major League Baseball history.
Cardinals third baseman Fernando Tatis hit two grand slams in the same inning while playing at Dodger Stadium. The pitcher was Chan Ho Park.
You can click here to read more on MLB.com about the record.
No player had ever done that before, nor has anyone done it since.
MLB cited the Baseball Reference, according to which there have been nearly 3.9 million innings pitched over 144 seasons of Major League history. And in only one of those has the same player hit two slams.