Dave Wannstedt has run some good defenses in his hey day. That cannot be said about the Bills' 26th-ranked defense this season.
Maybe it was beginner's luck when Wannstedt broke into the league as the defensive coordinator for the Dallas Cowboys. Jimmy Johnson brought him up from the University of Miami, and the Cowboys' D became one of the NFL's best.
Wannstedt was tabbed to replace the great Mike Ditka in Chicago, and was fired after going 41-57. He re-joined Johnson in Miami to coach the Dolphins, and it's been downhill ever since.
Wannstedt is widely blamed for driving a perennial playoff team into the ground in Miami. After his failure as an NFL head coach, he tried his luck at the University of Pittsburgh, where he was unable to get his team to compete in the Big East.
The Bills defensive coordinator is just not an effective coach anymore. Time to hang it up.