^ This is like picking gnat #### out of pepper but my point was being statistically (points, yards, DVOA, etc.) the best defense over however many consecutive years, not the best for a single season. Even then, number four seems fairly all-timey to me.
http://www.sportsonearth.com/article...-chicago-bears
In other news, ILB Bobby Wagner has been extended for four years
http://espn.go.com/nfl/story/_/id/13...ract-extension