I believe they should have a Defensive MVP or at least a Defensive player of the year kind of thing...Heck, if I could I'd make QB, Defense, and Offensive player categories all separate because a QB just wins every year no matter what.
They have defensive player of the year.
http://www.pro-football-reference.com/players/award_apdpoy.htm
Man football careers are so short. Can you believe Bob Sanders hasn't played since 2011 after that string of injuries to his..well like everything below the waist.