Warren Spahn, who will become the winningest left-hander in baseball history with 363 victories, signs a contract with the Boston Bees (Braves). Due to a clash with manager Casey Stengel and his enlistment in the U.S. Army, the 19 year-old southpaw will have to wait six years before he gets his first major league win.

On June 6, 1940 — Warren Spahn, who will become the winningest left-hander in baseball history with 363 victories, signs a contract with the Boston Bees (Braves). Due to a clash with manager Casey Stengel and his enlistment in the U.S. Army, the 19 year-old southpaw will have to wait six years before he gets his first major league win.

Sources:
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