Offensive 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?

Let's start on offense, where the Bills currently have about $49 million in cap obligations, or about 14 percent less than the NFL norm.

Here's how that $49 million breaks down, position-by-position. Note that players who signed "future contracts" for the 2014 season aren't included in this analysis:

Position: Quarterback

Players under contract (ordered by cap hit): Kevin Kolb, EJ Manuel, Thad Lewis, Jeff Tuel

Total cap hit: $6,761,052

Percent of team cap hit: 6.21

Comparison to NFL average: minus-44.78 percent

Position: Running back/Fullback

Players under contract: C.J. Spiller, Fred Jackson, Evan Rodriguez, Ronnie Wingo

Total cap hit: $10,625,416

Percent of team cap hit: 9.76

Comparison to NFL average: plus-48.63 percent

Position: Wide receiver

Players under contract: Stevie Johnson, Robert Woods, T.J. Graham, Marcus Easley, Marquise Goodwin, Kevin Elliott, Cordell Roberson

Total cap hit: $12,778,616

Percent of team cap hit: 11.74

Comparison to NFL average: minus-1.25 percent

Position: Tight end

Players under contract: Tony Moeaki, Lee Smith, Chris Gragg

Total cap hit: $2,548,194

Percent of team cap hit: 2.34

Comparison to NFL average: minus-56.78 percent

Position: Offensive line

Players under contract: Eric Wood, Erik Pears, Kraig Urbik, Chris Hairston, Cordy Glenn, Doug Legursky, Mark Asper, J.J. Unga

Total cap hit: $17,109,844

Percent of team cap hit: 15.72

Comparison to NFL average: minus-14.32 percent