‘Weaknesses: Middle linebacker and experienced offensive tackle depth. The Bills have yet to determine who will take over the middle linebacker spot following Edmunds’ departure. It remained a three-way competition between Terrel Bernard, Tyrel Dodson and A.J. Klein through Buffalo’s third preseason game. The Bills’ depth at tackle took significant hits after Brandon Shell was placed on the reserve/retired list and, days later, Tommy Doyle suffered a season-ending left knee injury. That leaves sixth-year player David Quessenberry as Buffalo’s only backup with NFL experience behind starters Dion Dawkins and Spencer Brown.’