A new D in New Orleans

Cameron Jordan has helped lead a revitalized Saints defense. Stacy Revere/Getty Images

It hasn't taken long for the New Orleans Saints to put last year behind them. Coach Sean Payton is back on the sidelines. QB Drew Brees looks in total control on the field. And most remarkable of all, the defense is dominating.

That's right -- a defense that finished dead last in all our rankings in 2012 is now the NFL's sixth-ranked D three weeks into the season. So with a roster featuring a number of the guys who struggled so much last year, what's caused the turnaround?