Andrew Bynum's knee problem is back.

Playing with a brace from the start of his season, the Lakers' center hyper-extended his right knee in the second quarter with 8:20 remaining against the San Antonio Spurs on Tuesday night.

Bynum walked on his own to the locker room, where it was revealed that he would not be able to return to the game and not travel with the team to Sacramento.

The 23-year-old big man will have an MRI Wednesday morning to learn the extent of the injury, for which he had surgically repaired last summer.

It's not really that bad, said Bynum of the injury, according to the Orange Country Register. It was painful right when it happened but it's not that bad right now.

Head coach Phil Jackson said that Bynum might miss a couple games. The Lakers end their regular season against the Kings tonight.  Jackson appears to be implying that Bynum will miss the first game of the playoffs, which start this weekend.

The Lakers have three teams they could face in the first round: Portland, Memphis, or New Orleans.