The main components of the 'Simple Ratings' are a production measure (a variant of John Hollinger's PER rating) for a player's own stats versus the counterpart player on the other team while he is on the court, as well as a simple on court/off court plus minus. This rating is actually more of a placeholder until the more sophisticated analysis we produce is made public, but still offers a good fast read on player performance.
As bad as Gasol's been, he's been our 2nd most impactful? WTF? Seems like it's skewed cos he plays with Kobe a lot. His actual production stats are poor.
Why is Dwight's so bad even though he has the 2nd highest production?
Overall league rankings