Gee, maybe his defense would have been better if he didn't give the ball away like it was free candy? Jim Kelly played in a far different era, one where it was rare for multiple players to throw for 4000 yards... now, it is the norm for several QBs do do it. Cutler was 9th ALL TIME in pass attempts last year. Cutlers numbers are severely inflated by the fact that he threw the ball so much. Cutler DID NOT throw the ball with high efficiency last year, in fact TE and Cutler are about the same when it comes to QB rating and YPA. Cutler had a far better team around him, and he couldn't muster a better QB rating or YPA than Trent Edwards?
In 1991, the 13th best QB had a rating of 80.3. In 2008 that would have been good for 22nd.