'McDermott runs a 4-3 defense, a shift from the 3-4 hybrid look Rex Ryan ran for the past two years in Buffalo. Three seasons ago, under Jim Schwartz, the Bills ran a 4-3 defense and finished 4th in yards allowed, 3rd against the pass, 11th against the run, led the league in sacks, and were highly ranked in several other statistical categories. Several key players from that season are still on the roster, but there’s also been some change. So, let’s look at the Bills current roster and where certain players would likely fit. Of course, it’s only January and there’s a lot of change possibly still ahead, including free agency and the draft…'.