15 years ago today, Fernando Tatis hit two grand slams in one inning

Some baseball players go their entire careers without hitting a grand slam. Derek Jeter famously needed 6,542 plate appearances to hit his first. Just 13 players have hit two grand slams in one game, and none have pulled that trick since Josh Willingham in 2009.

But only one man has ever slammed two salamis in a single inning: The Cardinals' Fernando Tatis, on April 23, 1999. Both came off the Dodgers' Chan Ho Park, and both were absolutely crushed. Tatis would go on to have his best season that year, hitting .298 with 34 homers and 21 steals.

Listen to Mark McGwire recall the night 15 years later: