Marv Levy, the charismatic coach who led the Buffalo Bills to an unprecedented four straight Super Bowls but couldn't revive a struggling franchise, told the team Monday that he will resign as the team's general manager. Bills' safety George Wilson told The Associated Press that Levy opened the team's wrap-up meeting with a five-minute address during which he said he won't return as GM. Following a meeting this week between Bills' owner Ralph Wilson Jr. and the 82-year-old Levy, a mutual decision was made that Levy would step down as Bills' GM, sources told ESPN's Chris Mortensen.