After his unanimous decision loss to Floyd Mayweather on Saturday night in Las Vegas, Manny Pacquiao said he injured his right shoulder in training and his camp said that Nevada boxing commissioners denied a request for him to take an anti-inflammatory shot in his dressing room before the fight.

Trainer Freddie Roach said the injury happened when Pacquiao banged shoulders with a sparring partner sometime after March 11. An MRI revealed a tear in his right shoulder. 

Promoter Bob Arum said Pacquiao’s camp thought he would be allowed the anti-inflammatory shot because he had gotten them during training and they had been approved by the U.S. Anti-Doping Agency. But he said paperwork filed with the commission didn’t check the injury box, and the Nevada commission ruled against the request for a shot.

“The ruling made tonight affected the outcome of the fight,” Arum said.

Nevada State Athletic Commission chairman Francisco Aguilar said Pacquiao’s camp wanted shots that included lidocaine, a drug that numbs the affected area. But he said Pacquiao’s representatives didn’t check the injury box after the weigh-in Friday, and the commission had no way of knowing how serious the injury was or what it could be treated with.

“I have no proof an injury actually exists and I can’t make a ruling based on what they’re telling me,” Aguilar said.

The Associated Press contributed to this report.