The two-hour procedure at the Kerlan Jobe Clinic was to repair the tear in his right shoulder which worsened during Saturday's fight in Las Vegas, the Philippines' ABS-CBNnews reported from California.
Pacquiao injured his shoulder around three weeks before the fight butchose go ahead, only announcing the injury at the last minute.
"His advisors concluded that with short rest, treatments and close monitoring, Manny could train and, on May 2, step into the ring against Floyd Mayweather Jr," the statement by Pacquiao and his promoters said earlier.
Pacquio postponed his scheduled Friday arrival in the Philippines for the surgery. Class action lawsuits were piling up against Pacquiao and his promoters for his failure to disclose his injury before people bought tickets for the fight and pay-per-view telecast, ESPN reported.
Five lawsuits were filed on Tuesday claiming that Pacquiao's injury significantly affected his fight since he was not on top form. All the suits ask for more than 5 million dollars in damages. Other fans have complained they lost on bets for Pacquiao that they say they would not have made had they known about his condition.