Andrew Bynum said he's had "a little bit of a setback" with his recovery from a bone bruise in his right knee, an injury that has prevented the All-Star center from playing – or even practicing – with the 76ers since they acquired him from the Lakers in a four-team deal in August.

Now he's having the same trouble with his left knee, as well.

"I don't know what's going on," Bynum said shortly before the Sixers' 99-93 victory against the Utah Jazz on Friday. "The doctors are pretty much saying I'm in a weakened cartilage state. And we'll kind of wait, I guess. They're not giving me anything real definite. I've just got to wait for the cartilage to get stronger."

Bynum said he's experiencing pain and swelling in both knees, but that his current low-impact workouts in the pool and on the elliptical are "not degrading the cartilage, as far as I know." He called it a "weird issue" that intensified since he last spoke with reporters on Monday. He since returned to visit his longtime orthopedist, Dr. David W. Altchek of the Hospital for Special Surgery in New York, to have an MRI on both knees.

Sixers general manager Tony DiLeo, pressed for clarification on Bynum's medical issue, repeatedly responded by asking, "What did Andrew say?"

"We're going to do what is best for Andrew, what is best for the organization, and try to get him healthy as he can be and get him back on the court when he is ready," DiLeo said. "His body will be the indicator. When he's feeling good, when the pain subsides from his knees, when he can step up in his rehab and do more strenuous activity, that will be the indicator. And to try to put a date on it is very difficult, as you know."

The Sixers announced on Monday that the team was aiming for the 7-foot, 285-pound Bynum to join practice around December 10, and expected him to need one to four weeks before being ready to appear in a game.