Thunder center Kendrick Perkins underwent arthroscopic surgery on his right knee Tuesday morning, The Oklahoman has learned. Perkins is expected to resume full basketball activities in two weeks. The scope, while considered routine for players with previous injuries, is not something Perkins envisioned needing this summer. He insisted at his exit interview in May that he didn't require any type of surgery this offseason. Perkins also said last month that he was “excited” about the prospects of finally going through a summer surgery-free. “To be honest with you, I was excited about this summer, being able to work on my game,” Perkins said during an appearance at a team-sponsored youth camp. “This is my first summer without having surgery, so I'm just excited about it. I definitely didn't like how I finished the season this past season, or the postseason. I was kind of embarrassed about the way I played. So the only way to go about it is to go back to the drawing board, and I'm just treating this summer like I'm a rookie again.”