William Lorenz "Larry" Kopf (November 3, 1890 – October 15, 1986) was a professional baseball player who played infielder in the Major Leagues from 1913 to 1923. He would play for the Cleveland Indians, Philadelphia Athletics, Boston Braves and Cincinnati Reds. Best known for his part in the only double no hitter in major league history. Kopf led off the tenth inning with a line drive single, breaking up a full nine innings without a hit for either team. He later scored on a single by Jim Thorpe.

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