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This Day in Sports History: Rocky Marciano Retires

On April 27, 1956, boxing legend Rocky Marciano retired. The "Rock from Brockton" ended his career at an undefeated 49-0 with an astonishing 43 KOs.

On April 27, 1956, boxing legend Rocky Marciano retired. The "Rock from Brockton" ended his career at an undefeated 49-0 with an astonishing 43 KOs.

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