On December 12, 1949 —  By a 7-1 vote, the American League rejects a proposal to bring back the legal spitball. The rules committee also alters the strike zone to the space between the armpits and the top of the knees. The new rule eliminates the batter’s shoulders being within the strike zone.

 


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Sources:

Baseball Reference December 12

SABR Games Project

National Pastime December 12

Hall of Fame

Replay The Game

Retro Sheet