Marc Gasol (knee) out indefinitely

Memphis Grizzlies star center Marc Gasol has been diagnosed with a sprained knee and will be out indefinitely, the team announced Saturday.

An MRI revealed that Gasol, the NBA's reigning Defensive Player of the Year, has a Grade 2 sprain of the MCL in his left knee.

Gasol will not undergo surgery, the team announced. The All-Star suffered the injury in the second quarter of Friday's loss to the San Antonio Spurs.

Replays indicated there was little if any contact before Gasol grabbed his knee under the Spurs' basket. He went to the Memphis locker room and did not return.

Gasol was second on the Grizzlies in points, rebounding and assists entering the game.

Kosta Koufos, obtained from the Denver Nuggets in an offseason trade, started the second half in Gasol's place. He's expected to fill in for the 7-foot-1 center.

Information from The Associated Press was used in this report.