Ranking the NFL's Defensive Leaders

Week one of the NFL season was pretty bad for the Chicago Bears and Pittsburgh Steelers. Pittsburgh won its opener against Tennessee, but defensive leader Troy Polamalu injured his knee, and is out for at least another two weeks. Polamalu will at least return to the field this season. The news was worse for the Bears. Not only did they lose a heartbreaker to Green Bay, but perennial Pro Bowler Brian Urlacher was lost for the season with a dislocated wrist. These are two of the most important defensive leaders in the NFL, and their respective defenses will suffer in their absence. It begs the question, which other teams would suffer if their defensive leader went down? I was asked by Bleacher Report to rank the top defensive leaders on the remaining 30 NFL teams. It's arduous process, and I sought advice from others who know their respective teams better than I do. I realize there will be some disagreement, so please comment. Feedback, good or bad, is always welcome.Begin ...