Andrew Bynum is hurt again. On Saturday against the Grizzlies, Kobe Bryant landed on the big man’s knee, knocking him out for at least a few weeks. Reports are sketchy, but the Daily News is reporting that he’ll be out six weeks.

The preliminary diagnosis is that Bynum suffered a sprained right knee against Memphis Saturday and will miss the next six weeks. But it could be longer, and the damage could be more serious, pending results of an MRI taken yesterday in Manhattan.

So six weeks would mean that Bynum would potentially be back in mid-March, giving him about a month to get in shape for the Lakers’ playoff run. Does any of this seem familiar? Bynum was supposed to be back for last year’s playoffs but it never happened.

And this is probably a best case scenario. If the MRI reveals more damage to the knee, it’s entirely possible that Bynum will miss the playoffs yet again.

Expect Pau Gasol to move over to play center full time with Lamar Odom getting most of the minutes at power foward. I wouldn’t expect Odom to be traded before the deadline with Bynum’s status up in the air. This is exactly why the Lakers chose to hold onto him despite several trade offers — he’s great insurance if Bynum or Gasol were to go down.

Afternoon Update: The OC Register is reporting that Bynum has a MCL tear and is expected to miss 8-12 weeks. Twelve weeks would put Bynum’s return a week or two into the playoffs.