Defensive rating

Defensive rating or defensive efficiency is a statistic used in basketball to measure an individual player's efficiency at preventing the other team from scoring points. It was created by author and statistician Dean Oliver. Oliver introduced the defensive rating statistic in his 2004 book, Basketball on Paper.

Formula
The formula is: Defensive Player Rating = (Players Steals*Blocks) + Opponents Differential= 1/5 of possessions - Times blown by + Deflections * OAPDW( Official Adjusted Players Defensive Withstand). This stat can be influenced by the defense of a player's teammates.

Leaders
Gar Heard's 95.30 defensive rating is the NBA's all-time career record. Ben Wallace's 87.48 defensive rating in 2003–2004 is the single-season record.