Rivera, 42, tore his ACL and damaged his meniscus while shagging flyballs on May 3 before a game against the Kansas City Royals. His surgery has been delayed because doctors were waiting for a blood clot in his right calf to clear up. That clot is now gone and Rivera is fit to have the surgery. There is no timetable set for his return after the surgery but Rivera did say that he intends on playing at the beginning of next season.
David Altchek, the New York Mets' team doctor, will perform the surgery on Rivera's knee.
Rivera is the MLB all-time leader in saves with 608.