It's not that knee, but Kendrick Perkins is still hurt enough that he's reportedly going to miss some time.

Perkins suffered a strained medial collateral ligament in his left knee in the Boston Celtics' win over the Golden State Warriors on Tuesday, and he will be sidelined at least the next three games, reported on Wednesday.

Perkins injured his right knee in Game 6 of last season's NBA Finals, had surgery on his anterior cruciate ligament and missed the first 43 games this year.

Since returning, Perkins is averaging 7.3 points and 8.1 rebounds per game.

The Celtics are struggling to put a center on the floor, with Shaquille O'Neal and Jermaine O'Neal both out with injuries. Rookie Semih Erden returned to the lineup on Tuesday after missing time with a strained muscle.

The Celtics play Thursday in Denver against the new look Nuggets, Saturday against Blake Griffin and the Clippers in Los Angeles and Monday in Utah against a Jazz team that just traded Deron Williams.