Rex changing what was not broken , the defense. Could have kept Schwartz , his coaches and system.
Players not comfortable with Rex system , now lots of injuries . I won't blame the new system on injuries.
What might have been, but
Levy said. "I don't pay attention to any of it, not any of it. A coach who starts listening to the fans winds up sitting next to them in the stands."
http://www.nytimes.com/1990/12/21/sports/bills-with-kelly-out-go-for-divisional-title.html