When occured: 
Sun, 1966-07-03

On July 3, 1966, Tony Cloninger of the Atlanta Braves becomes the first National League pitcher to club two grand slams in a game. Cloninger drives in nine runs in a 17-3 shellacking of the San Francisco Giants. Cloninger’s nine RBIs set a single-game record for a pitcher.

Atlanta Braves, San Francisco Giants, Tony Cloninger
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