Manny Pacquiao will undergo right shoulder surgery later this week to repair a "significant tear" in his rotator cuff, orthopedic surgeon Dr. Neal ElAttrache told ESPN.com on Monday night.
"We have an MRI scan that confirms he has a rotator cuff tear. He has a significant tear," said ElAttrache, who was still with Pacquiao at his Kerlan Jobe Orthopedic Clinic office in Los Angeles when he spoke to ESPN.com.
ElAttrache said Pacquiao will be out of action between nine months and a year, assuming the surgery and rehabilitation go well.
The day for the surgery has not been set, but it will take place in Los Angeles, Pacquiao adviser Michael Koncz said.
"After speaking with the doctor, it was determined that the best method and approach is for Manny to have surgery," Koncz said. "Manny is doing OK."