Thunder guard Westbrook has third knee surgery of 2013

The Oklahoma City Thunder announced Friday that guard Russell Westbrook had his third surgery of the year Friday.

The Thunder said Westbrook had underwent successful arthroscropic surgery on his right knee Friday morning. According to Executive Vice President and General Manager Sam Presti, Westbrook did not have any pain but swelling had increased.

"After consultation and consideration by his surgeon in Los Angeles, a plan was established to monitor the swelling that included a series of scheduled MRIs," said Presti. "On the most recent MRI it was determined by the surgeon that there was an area of concern that had not previously existed, nor was detectable in the previous procedures, and it was necessary to evaluate Russell further."

The physician determined arthroscopic surgery was needed to address the swelling and operated on Westbrook Friday morning.

Westbrook is expected to return post All-Star break, according to the team. That means Westbrook will miss at least 27 games and the earliest he could return is Thursday, Feb. 20 vs Miami.

His first surgery was in late April after colliding with Rockets guard Patrick Beverley in the first round of the playoffs, ending his season. In October, he underwent a second surgery to address swelling caused by a loose stitch. He was expected to miss the first month but returned early, after missing just two games.