Robinson has knee surgery

Robinson played just one game for Oklahoma City before undergoing arthroscopic surgery yesterday on his right knee. He’ll be out 4-6 weeks. The news came only a few days after the Thunder said Perkins would need 2-3 weeks to recover from the MCL sprain he suffered Feb. 22 at Golden State while with the Celtics.

The Celtics traded away five players at the deadline. Only one of them was healthy, and injury issues were a concern.

“We knew about it,’’ Celtics coach Doc Rivers said. “The Nate injury, I knew he was having knee pains, but other than that I didn’t know much about it. Perk we knew, obviously. He got hurt in the game against [the Warriors], so we knew he’d be out for a little bit.’’