Mayweather beats Pacquiao in megabout, remains undefeated
Mayweather says next fight will be his last; Pacquiao said he thought he had the fight won.
Floyd Mayweather Jr. of the U.S. yells out to the crowd after defeating Manny Pacquiao of the Philippines in their title fight in Las Vegas, Nevada, May 2, 2015. (photo credit: REUTERS)ByREUTERS