Richard Schaefer, chief executive of Golden Boy Promotions, said that Mayweather has been in tremendous pain since suffering the injury during training on Thursday.
"He tried to work through it. He really did not want to postpone the fight, but it came to the point where he could barely sit," Schaefer said on Monday. "He could not train, he could not move and there was really not much of a choice." Mayweather(39-0, 25 KOs) was scheduled to fight Juan Manuel Marquez (50-4-1, 37 KOs) on July 18 at the MGM Grand in Las Vegas.
Schaefer said both fighters have committed to rescheduling and a September date has been mentioned. But promoters and the fighters won't agree to a date without the OK of doctors.
Mayweather hasn't boxed since knocking out Ricky Hatton in December 2007. He was slated to fight a rematch with Oscar De La Hoya but instead abruptly retired last June, while still considered the sport's pound-for-pound king.
