Best and Worst Defensive Players in NBA

I wrote this on 8/3 (Link)
A blogger (Dan Rosenbaum) did a statistical analysis to determine who are the best defensive players at their position. He looked at how much a team was scored on with the player on the court versus with the player off the court. He threw out garbage minutes and made other adjustments. He analyzed players for their career, but said the results for rookies (particularly rookies who didn't play a lot of minutes) are not stable. One obvious problem with this methodology is that if you split time with someone who is a defensive wizard your results are going to understate your defensive abilities and if you split time with a matador, the results are going to overstate your defensive prowess. For example, Tony Allen's #1 ranking is due in part to Ricky Davis' poor defense.

Notable for the Lakers - Tierre Brown was the third worst point guard. Potential Laker PG's Tyronn Lue was the second worst, Damon Stoudamire was the fourth worse. Carlos Arroyo, who some Laker fans wanted Mitch to get when he was dealt mid-season, is fifth worse.

Here is the list. Top part is the best defensive players from very best on down. The bottom part is the worst defensive players from very worst on up:
Point Guards      Shooting Guards    Small Forwards
================  =================  ================
Chris Duhon       Tony Allen         Shane Battier
Marcus Banks      Andre Iguodala     Darius Miles
Earl Watson       Josh Smith         Trevor Ariza
Jason Kidd        Ben Gordon         Shandon Anderson
Eric Snow         Aaron McKie        Paul Pierce
                  Gerald Wallace     Bruce Bowen
                  Manu Ginobili
                  Eddie Jones

Troy Hudson       Michael Redd       Peja Stojakovic
Tyronn Lue        DeShawn Stevenson  Matt Harpring
Tierre Brown      Jalen Rose         Lee Nailon
Damon Stoudamire  Keith Bogans       Wally Szczerbiak
Carlos Arroyo     Latrell Sprewell   Tim Thomas
Nick Van Exel     Raja Bell          Carmelo Anthony
Leandro Barbosa   Ricky Davis
                  J.R. Smith

Power Forwards       Centers  
===================  ================  
Tim Duncan           Ben Wallace  
Kevin Garnett        Dikembe Mutumbo  
Nick Collison        Theo Ratliff  
Tyson Chandler       Jason Collins  
Nenê                 Joel Pryzbilla  
Andrei Kirilenko      
Rasheed Wallace      


Matt Bonner          Primoz Brezec  
Cliff Robinson       Marc Jackson
Antawn Jamison       Predrag Drobnjak
Juwan Howard         Mark Blount
Austin Croshere      Eddy Curry
Antoine Walker
Shareef Abdur-Rahim