Celtics center Jermaine O'Neal could miss another 2-3 weeks because of a left knee injury, according to coach Doc Rivers.

O'Neal hasn't played since Nov. 8, when he logged nearly 11 minutes in the Celtics' 89-87 loss at Dallas.

"He's still going through a couple more evaluations," Rivers said of O'Neal.

The coach said he had not heard the word "surgery" mentioned in conversations about O'Neal's situation.