You people are missing the rotations because what you are seeing is Powe sticking to his man and then when someone is left wide open or a lane opens you believe what you're seeing is bad defense on another player. Rotations in this defensive scheme are not limited to help defense on a drive.
Here's an example on a screen set on the perimeter. The Celtics have the screen man's defender jump out to slow the man with the ball down and then have the defender on the ball go under the man. Sometimes there's a switch, sometimes the jump slows the man up. But if the screen man's defender can't get back to his man, the rotation is for him to fall back into the lane and have the person who has a man in the lane or posting on the side the screen man went to jump the defense on the picker while the picker's original defender rotates down through the lane prohibiting the pass down under and watching for a roll and then he grabs the man who was vacated down low.
The Celtics run all sorts of variations of this three man rotating defense on all sides of the court and depending on the movement of the offense can often get into four and five man rotations. It can get complicated.
Powe seems to constantly stick to his man or do a simple switch. When he has to do a three or four man rotation he is way too often very late realizing which player he is supposed to go to and leaves the man open. This is why you often see Baby on the perimeter guarding a point guard or on the wing guarding the PF or SF. He gets it. He goes where he's supposed to. Powe does not. If bench players are sitting or their minutes start to dwindle this is probably the main cause of it. It is why Scal and Baby played center yesterday and Powe saw limited time and POB never sees the floor, among other reasons.
This is what you have to watch for.
Great post. This is what I have been trying to say for the last two years, but haven't been able to explain it nearly as clearly.
Despite these supposed missed rotations, powe's +/- numbers STILL are much much better than Davis.
http://www.82games.com/0809/0809BOSP.HTMThe numbers show he played great with Kevin Garnett so far this season ( +33 per 48 min. ) vs. davis and garnett ( just +12 per 48, worst player with garnett except for scal and TA)
also they show Davis and Perkins are terrible together ( -26 per 48) while powe and Perkins are ok (+3 per 48)
Kelly Dwyer agrees
"Scalabrine eventually fouled out, and as a result, Glen Davis played 30 minutes. Now, while this may seem like a reaction to Davis' 1-12 shooting night, you have to understand that I pride myself on trying to be even keel with these things. That said, Davis is killing the Celtics. Destroying this team.
His PER on the season is around 8, which puts him amongst the worst rotation players in the NBA, and PER doesn't account for his defensive attributes. Which are awful. Ruddy awful. And I just refuse to buy the excuse that Doc Rivers can't play Kevin Garnett and Leon Powe on the court together. "