Defensive cap breakdown: Bills

The Buffalo Bills could have an extra $17 million of cap space entering next season.

They're under no obligation to use it -- they must spend up to 89 percent of the salary cap only on a four-year basis -- but if the Bills wanted to devote some of the carried-over cap space to certain positions, where should they look?

On defense, the Bills currently have about $56 million in cap obligations, or about 15 percent more than the NFL norm.

Here is how that $56 million breaks down, position-by-position. Note that players who signed "future contracts" for the 2014 season aren't included in this analysis:

Position: Defensive tackle

Players under contract (ordered by cap hit): Marcell Dareus, Kyle Williams, Alan Branch, Stefan Charles, Corbin Bryant

Total cap hit: $16,208,232

Percent of team cap hit: 14.89

Comparison to NFL average: plus-109.56 percent

Position: Defensive end

Players under contract: Mario Williams, Jerry Hughes

Total cap hit: $22,395,000

Percent of team cap hit: 20.58

Comparison to NFL average: plus-115.88 percent

Position: Linebacker

Players under contract: Manny Lawson, Kiko Alonso, Nigel Bradham, Ty Powell

Total cap hit: $5,258,429

Percent of team cap hit: 4.83

Comparison to NFL average: minus-61.68 percent

Position: Cornerback

Players under contract: Leodis McKelvin, Stephon Gilmore, Ron Brooks, Nickell Robey

Total cap hit: $8,613,145

Percent of team cap hit: 7.91

Comparison to NFL average: minus-18.33 percent

Position: Safety

Players under contract: Aaron Williams, Da'Norris Searcy, Duke Williams, Jonathan Meeks

Total cap hit: $4,340,534

Percent of team cap hit: 3.99 percent

Comparison to NFL average: minus-38.15 percent