Celtics: In case it wasn't clear, Perkins is out for Game Seven

Early during last night's shitstorm of a Game Six Lakers blowout, Kendrick Perkins went down in pain, clutching his knee. He would not return. Now we learn that he, indeed, will not play in the decisive Game Seven against Los Angeles. Kurt Helin of NBC's ProBasketballTalk describes the scene thusly:

[Perkins] arrived at Staples Center today with his teammates, walking on crutches and with a heavy brace on the knee. Looking very down, he said he suffered a torn MCL and a partially torn PCL in his knee. An MRI will be done to confirm this diagnosis.

Not good. Yes, Glen Davis and Rasheed Wallace have played well off the bench this series. But this is still, obviously, a huge blow.