A slight tear in his abdominal muscle, will force Michael Olowokandi to miss two to four weeks of action.

Olowokandi sat out Thursday's practice with pain in his stomach. He had an MRI exam Thursday night, revealing a small tear.

"It's worse than I guess we thought," Celtics coach Doc Rivers said. "Michael actually wanted to get a shot to play, and then when they found out it was a small tear they obviously ruled that out."