The Buffalo Bills have reportedly "zeroed in" on Carolina Panthers defensive coordinator Sean McDermott as their next head coach, according to Vic Carucci of the Buffalo News.

McDermott has interviewed with the Bills, San Diego Chargers and San Francisco 49ers.

The NFL has very few teams this season that excel in all facets of the game. Further evidence of this issue shows itself in the fact that there is only one team ranking in the top-10 in both Football Outsiders' Offensive and Defensive DVOA.

Last season, the Seattle Seahawks, Carolina Panthers, Arizona Cardinals, Cincinnati Bengals and Kansas City Chiefs ranked in the top-10 on both sides of the ball.

The Chiefs were the closest team to finish in the top-10 in both Offensive and Defensive DVOA at 13th and 14th.

The New England Patriots and Dallas Cowboys finished the season ranked first and second in both Total DVOA and Weighted DVOA.