By Edward Chaykovsky

Manny Pacquiao could face disciplinary action from the Nevada State Athletic Commission for failing to disclose a shoulder injury prior to his twelve round decision loss to Floyd Mayweather Jr. this past Saturday night at the MGM Grand in Las Vegas.

According to Fox Sports, Nevada Athletic Commission chairman Francisco Aguilar said Monday that the state attorney general's office will investigate as to why Pacquiao checked "no" a day before the fight on a commission questionnaire asking if he had a shoulder injury.

Pacquiao could face a possible fine or suspension for not answering the question accurately on a form he filled out prior to last Friday's official weigh-in.

Following Pacquiao's loss to Mayweather, the boxer and his promoter Bob Arum of Top Rank revealed that Manny had suffered a right shoulder injury several weeks ago in training camp. An MRI was taken weeks ago and revealed a tear.

The twelve round fight further aggravated the injury, which is now being reported to be a torn rotator cuff. Pacquiao will undergo surgery which is likely going to keep him out of the ring until next year.

Aguilar says the commission first became aware of the injury about 90 minutes before the fight, when Pacquiao's camp made a request for the boxer to get an anti-inflammatory shot on his shoulder, which the NSAC denied because they had no knowledge or confirmation of an actual injury. Arum says USADA [US Anti-Doping Agency] approved the anti-inflammatory medication.