Johan Santana is set to have shoulder surgery Tuesday.
The Mets say a second opinion given by noted orthopedist Dr. James Andrews confirms that the two-time AL Cy Young Award winner has a torn anterior capsule on the front and bottom of his left shoulder and that surgery was the best course of action.
Team doctor David Altchek will perform the operation in New York.
The Mets had said Santana should be able to resume throwing next spring but there is no timetable for his return.
This will be the third straight year that Santana will spend the offseason recovering from surgery. The 31-year-old left-hander has three seasons remaining on his $137.5 million, six-year contract.
He was 11-9 with a 2.98 ERA in 29 starts this season.