Mayweather needs Canelo on undercard now more than ever if Alexander is next opponent

By Chris Williams: If Floyd Mayweather Jr. does indeed go with IBF welterweight champion Devon Alexander as his next opponent on May 4th in Las Vegas, then Floyd is going to need WBC junior middleweight champion Saul "Canelo" Alvarez on the undercard than before if Mayweather wants to make sure his pay per view numbers