Cleveland Cavaliers guard Kyrie Irving underwent successful surgery Saturday to repair the fractured left kneecap that will sideline him for the remainder of the NBA Finals. The 23-year-old All-Star playmaker suffered the injury in over-time of Thursday's 108-100 Cavaliers' loss to Golden State in the opening game of the best-of-seven championship series. Cavaliers team physician Richard Parker and doctor Damien Billow performed the operation at the Cleveland Clinic after Irving flew there for the surgery, which is expected to prevent him from any basketball activity for three to four months.