‘Centers, who admits he has been looking forward to playing Buffalo since signing with New England, is concentrating on keeping his emotions in check. His role diminished last season as Bledsoe’s Bills begin throwing the ball more down the field. “I have to play within the scheme and not allow my emotions to become a factor, a negative factor,” he said. “If anything, if I can utilize it in a positive way to help that would be good, but I have to just go out and be a professional.”‘