Mayweather to unretire, resume boxing after Tyson exhibition - ESPN

Mayweather to unretire, resume boxing after Tyson exhibition  ESPNUndefeated boxing legend Floyd Mayweather coming out of retirement after nine years  Fox NewsFloyd Mayweather plans to end boxing retirement, return to pro fights after Mike Tyson exhibition  CBS SportsFloyd Mayweather, 48, announces return to pro boxing after Mike Tyson exhibition, will put 50-0 record on the line  Yahoo SportsGrand Rapids boxing legend Floyd Mayweather Jr. to come out of r