Mayweather Passed Rocky Marciano for Most Wins Without a Loss in Boxing History

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Fact: Floyd Mayweather (50-0) beat Conor McGregor on Saturday night, passing Rocky Marciano (49-0) for the most wins without a loss or draw in boxing history.

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Bleacher Report will be bringing sports fans the most interesting and engaging Cold Hard Facts of the day, presented by Coors Light.   

Source: B/R Insights