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Buffalo Bills' Biggest Concern: I see three areas for concern right now. To me, the biggest one is the lack of continuity on the offensive line.
Erik Pears was supposed to be the starting right tackle, but due to a groin injury, he needed to sit out the entire preseason. Not taking any snaps leaves me to wonder how effective and efficient the offensive line will be when he is inserted in the starting lineup for Week 1.
In addition to Pears, center Eric Wood has seen limited snaps as he makes his way back from his second serious leg injury. The Bills had hoped for rookie Cordy Glenn to battle it out with second-year tackle Chris Hairston for the left tackle job, but Hairston was inserted at right tackle to hold the fort down for Pears. So, Glenn claimed the starting job by default, and nobody is sure how much or where Hairston will play when Pears comes back.
The entire line is impacted by all of this shuffling, which is not the way you want your season to start, especially when your opening opponent is one of your AFC East rivals, the New York Jets, which is the team the Bills have to beat to make a playoff run.
The other concerns are valid but might be more of a temporary nature. The linebackers have been giving up some big yards on both run and pass plays. Why this might be temporary is that the Bills starting defense has been very vanilla so far in preseason, as Dave Wannstedt has not allowed them to do any stunting or blitzing yet. I suspect that the linebacker play will be much improved once Wannstedt takes off the handcuffs.
There is also the issue of the final cuts, where Chan Gailey opted to keep only four wide receivers (plus Brad Smith) and four quarterbacks on the final roster. That is as screwy of a positional allotment for personnel as I can ever recall.
The final concern deals with all of the youth in the secondary. Stephon Gilmore, Aaron Williams, Ron Brooks and Justin Rogers are all either rookies or second-year men. They haven't seen enough or experienced enough yet to know how they will respond when the bullets start to fly in the regular season.
The Bills are hoping for the best, but they truly need reps and direct game experience to grow and develop. A strong pass rush will certainly help them out as well.