At center, second-year man Khaled Holmes had only a dozen snaps last season as a rookie with Indianapolis. Now with the decision to release two-year starter Samson Satele and not re-sign McGlynn, Holmes will go into the 2014 season as the team's top option at the center position.

The depth includes a pair of undrafted rookies -- former Florida center Jonathan Harrison and a local product in ex-Indiana State center FN Lutz III. Guard Hugh Thornton could move in to play the position if needed and another guard, Donald Thomas (who is recovering from injuries suffered early last season), has limited experience at center.

Meanwhile, cornerback Qua Cox, an undrafted rookie from Jackson State made a quick impression on the coaching staff this spring. The 6-foot, 185-pound native of Tuskegee, Ala., intercepted a pass and returned it for a touchdown in the team's rookie minicamp. He played well when given the opportunity during OTAs. On a team needing to improve its depth at the cornerback position, Cox has a real chance to make the Colts' 53-man roster if he continues to perform at that level.

Here is a snapshot of the Colts as they head into training camp:

--QUARTERBACKS: Starter -- Andrew Luck. Backups -- Matt Hasselbeck, Chandler Harnish.

--RUNNING BACKS: Starter -- Trent Richardson. Backups -- Vick Ballard, Ahmad Bradshaw, FB Mario Harvey, FB Stanley Havili, Dan Herron, Chris Rainey, Zurlon Tipton, FB Cameron White.

--TIGHT ENDS: Starter -- Coby Fleener. Backups -- Dwayne Allen, Jack Doyle, Weslye Saunders, Erik Swoope.

--WIDE RECEIVERS: Starters -- Reggie Wayne, T.Y. Hilton, Hakeem Nicks. Backups -- Ryan Lankford, Josh Lenz, Donte Moncrief, Greg Moore, Da'Rick Rogers, Eric Thomas, Tony Washington, Griff Whalen.

--OFFENSIVE LINEMEN: Starters -- LT Anthony Castonzo, LG Donald Thomas, C Khaled Holmes, RG Hugh Thornton, RT Gosder Cherilus. Backups - T Jack Bruckner, C Jonotthan Harrison, T Ulrick John, G Lance Louis, C FN Lutz, G/T Jack Mewhort, T Xavier Nixon, G Joe Reitz, G Josh Walker.

--DEFENSIVE LINEMEN: Starters -- DE Cory Redding, NT Josh Chapman, DT Ricky Jean Francois. Backups - E Gannon Conway, E Tyler Hover, T Montori Hughes, E Arthur Jones, NT Zach Kerr, NT Brandon McKinney, E Nnamdi Obukwelu, T Jeris Pendleton.

--LINEBACKERS: Starters - SLB Erik Walden, SILB D'Qwell Jackson, WILB Jerrell Freeman, WLB Robert Mathis. Backups -- OLB Daniel Adongo, ILB Andrew Jackson, OLB Cam Johnson, ILB Josh McNary, Aaron Morgan, ILB Henoc Muamba, OLB Jonathan Newsome, ILB Kelvin Sheppard, OLB Andy Studebaker, OLB Bjoern Werner.

--DEFENSIVE BACKS: Starters -- LCB Greg Toler, S Delano Howell, S LaRon Landry, RCB Vontae Davis. Backups - CB Johnny Adams, S Mike Adams, S Colt Anderson, S Sergio Brown, CB Marcus Burley, CB Brandon Burton, CB Darius Butler, CB Qua Cox, CB Josh Gordy, CB Kameron Jackson, S Dewey McDonald, CB Sheldon Price, CB Louchiez Purifoy, S David Sims.

--SPECIAL TEAMS: K Adam Vinateri, P Pat McAfee, LS Matt Overton, PR Griff Whalen, KOR Donte Moncrief, K Cody Parkey.