It was announced that on May 1 , 2010 , Mosley would fight undefeated Floyd Mayweather , Jr. . Boxing purists had called for the fight for over ten years . Mosley was scheduled to fight WBC champion Andre Berto in a unification fight , but Berto had to pull out after an Earthquake in Haita killed some of his family members . Mosley 's WBA title was not on the line because Mayweather refused to pay WBA sanctioning fees . On the fight night , Mosley stunned Mayweather with two right-hand shots in the second round . Mayweather recovered well and dominated the remainder of the fight with superior reflexes and his effective counter-punching style , eventually beating Mosley in a wide decision 119 – 109 , 119 – 109 , and 118 – 110 on the scorecards to win Mosley 's '' lineal '' welterweight championship
Earthquake in Haita
2010 Haiti earthquake
Shane Mosley