Friday, August 05, 2005

Defense: what do the adjusted plus/minus ratings say?

By Dan T. Rosenbaum

I have updated my defensive ratings and provided more detail in an article posted at

We can debate about what plus/minus statistics tell us about future defensive effectiveness (especially if a player changes roles), but there can be no debate about what they tell us about past defensive effectiveness. Like a free throw percentage statistic that records who was the most effective free throw shooter, plus/minus statistics can be used to record who was the most effective defender. The calculation is more complicated, especially when we account for the other players on the floor, but the concept is the same.

Nobody, including this author, believes that these lists are the be all and end all.

Last updated: 9:30 AM, August 5, 2005


Anonymous Anonymous said...

I'm wondering if there is any way to get a spread sheet with updated +/- ratings? Am I supposed to be buying a book or something?


10/29/2005 4:34 PM  

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