Mayweather: 'I was born to be a winner'

Pre-order Mayweather-McGregor now digitally and watch on any device | Get tickets for biggest fight in combat sports historyA little over 15 years ago, Floyd Mayweather went through what many believe was the toughest fight of his professional career, a grueling 12-round scrap with Mexico’s Jose Luis Castillo. Some even thought he lost, though the judges disagreed and that’s all that matters. The victory, which came when the Grand Rapids native was still “Pretty Boy&rd