Although defense is often overlooked by NBA fans, it is crucial to a team's success. Much of these players' success does not appear in the box score. The problem with the box score is that the only defensive stats in a typical box score are blocks and steals. However, there are many other traits that make a great defender.
The way I will evaluate the best defenders is by using the Player Efficiency Ratings (PER) of the players they guarded throughout the 2011-2012 NBA season. In other words, I'm looking at the PER of the players they played against. The average PER for the 2011-2012 season was 13.5.
All of these stats can be found at www.82games.com.