Chris Kaman, the Clippers' first-round pick in the June NBA, draft will be out indefinitely because of a herniated disk in his lower back.

Clippers trainer Jasen Powell said Kaman originally suffered the injury in a weight-training session before the draft. Since being drafted by the Clippers, Kaman has undergone a rehabilitation program that focuses on flexibility and stretching.

"Depending on how he progresses with his exercises and conditioning will determine when he will be back," Powell said. "I don't want to put a timetable on it."

The Clippers open training camp Saturday, and Powell said Kaman will be limited to specific drills in addition to his prescribed rehab program. Kaman, a 7-foot center, was picked sixth overall in the draft after his junior season at Central Michigan. He averaged 22.3 points, 12 rebounds and 3.2 blocks last season.

Team physician Tony Daly said Kaman's back should recover through rehabilitation and will not require surgery.