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boxing Toughest Professional Fighters in History  

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Rocky Marciano is listed (or ranked) 1 on the list Toughest Professional Fighters in History
Rocky Marciano Died at 46 (1923-1969)

The Toughest Professional Fighters in History The Greatest Baseball Players of All Time

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Muhammad Ali is listed (or ranked) 2 on the list Toughest Professional Fighters in History
Muhammad Ali age 75

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Joe Louis is listed (or ranked) 3 on the list Toughest Professional Fighters in History
Joe Louis Died at 67 (1914-1981)