During the 2010 offseason, with Perkins expected to be out until February 2011, the Celtics signed two former All-Star centers, Shaquille O'Neal and Jermaine O'Neal. Shaquille O'Neal's presence wound up leading to Perkins' departure: the Celtics were 33–10 in games Perkins had missed during the year due to injury and had a 19–3 record in games when O'Neal played over 20 minutes. Consequently, Perkins was traded to the Oklahoma City Thunder in February, when the Celtics were 41–14 and led the Eastern Conference despite another rash of injuries. Following the trade, however, they proceeded to win only 15 of their final 27 games. They finished with a 56–26 record, sliding to the third seed. The 2010–11 season still provided three landmarks: The Celtics became the second team to reach 3,000 victories, Paul Pierce became the third Celtic to score 20,000 points (the others are Larry Bird and John Havlicek), and Ray Allen broke the NBA record for most career three-pointers. The 2011 NBA playoffs started with the Celtics sweeping the New York Knicks 4–0 in the opening round. In the second round, they were ousted by eventual Eastern Conference champions Miami Heat in five games. Shaquille O'Neal, limited to 12 minutes in two games of the second round, retired at the end of the season.