5. Buffalo Bills
Quietly, Buffalo finished with the AFC’s No. 4-ranked defense in 2013. But now the team is without its defensive coordinator, Mike Pettine, who’s the head coach in Cleveland. Former Lions coach Jim Schwartz is now running the show, and he boasts a background with the defensive line. Mario Williams and Kyle Williams should be a thorn in the side of opposing quarterbacks. The questions lie within the secondary without Jairus Byrd and the linebacking unit without Kiko Alonso.
