Free-agency series: Centers and guards

This is third in a 10-part series breaking down the Cowboys' free-agency needs, position by position:


Who’s on the roster: G-David Arkin, G-Mackenzy Bernadeau, G-Ray Dominguez, G-Kevin Kowalski, G-Ronald Leary, G-Nate Livings, C-Ryan Cook, C-Phil Costa.

Analysis: The Cowboys signed Costa to a two-year deal and, at least for right now, he's the projected starter for 2013. Kowalski and Bernadeau can also play center, which gives the Cowboys position flexibility. The guard position has veterans Bernadeau and Livings, but Leary impressed the coaches as the season progressed, and he'll push to make the active roster this season. It's probably time to see if Arkin and Kowalski can prove to the coaches and scouts that they can play in this league. Both won't replace Livings or Bernadeau, however, and the Cowboys do need quality backups in the interior.

NFL free agents of interest: G-Derrick Dockery, G-Brandon Moore, G-Donald Thomas, G-Kevin Boothe, C-Jeff Faine.

Need meter: 4. The Cowboys might get a guard in the draft, which could push Arkin or Kowalski off the roster. What's left of the roster in the interior needs to improve badly. The Cowboys will most likely pass on Dockery, who filled in when needed last year. Thomas is an interesting pickup and should challenge for a starting job if given an opportunity. Faine had some injury problems last season, but he is a veteran who could provide security if there are problems with Costa and Cook.