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LAS VEGAS, NV - MAY 03:  Floyd Mayweather Jr. celebrates after defeating Marcos Maidana by majority decision in their WBC/WBA welterweight unification fight at the MGM Grand Garden Arena on May 3, 2014 in Las Vegas, Nevada.  (Photo by Harry How/Getty Images)
LAS VEGAS, NV - MAY 03:  Floyd Mayweather Jr. celebrates after defeating Marcos Maidana by majority decision in their WBC/WBA welterweight unification fight at the MGM Grand Garden Arena on May 3, 2014 in Las Vegas, Nevada.  (Photo by Harry How/Getty Images)

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    Floyd Mayweather's most lucrative fights

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Floyd Mayweather's most lucrative fights

Floyd "Money" Mayweather Jr. earned an estimated $1 billion during his boxing career. Here are three of his most lucrative fights.

Floyd Mayweather's most lucrative fights

Floyd "Money" Mayweather Jr. earned an estimated $1 billion during his boxing career. Here are three of his most lucrative fights.