Andrew Bynum sprained his right knee Saturday as the Lakers were facing the Grizzlies in Memphis.

Kobe Bryant crashed into Bynum at the end of an off-balance drive.

Bynum yelled out immediately after Bryant hit his knee. He stayed down for about two minutes and pounded the court with his fist as trainer Gary Vitti talked to him. It is not the same knee that ended Bynum's 2007-08 season prematurely.

Bynum will have an MRI to determine the severity of the injury.