OAKLAND (CBS SF) – If the Cleveland Cavaliers are going to win the NBA Championship, they’ll have to do it without their second leading scorer.

The Cavaliers confirm that Kyrie Irving was diagnosed with a broken kneecap after an MRI at Stanford Friday.

Irving left last night’s NBA Finals game one in the overtime of the Warriors win with a left knee injury. He will reportedly have surgery “in the coming days at the Cleveland Clinic in Cleveland by Cavaliers head team physician Dr. Richard Parker.”

He is expected to need most of the offseason to recover.