Position Series: Left Guard Still Big Line Concern

Roster Breakdown:
Flozell Adams - Gets criticized for too many false starts, but if he can keep Romo's blindside protected, he's doing his job.
Leonard Davis- One of two Cowboys players ever (La'Roi Glover) to make the Pro Bowl in his first two seasons with the club.
Marc Colombo - Plays mean and nasty. The Cowboys need a little bit more of that.
Andre Gurode - Don't look now, but Gurode is making a claim as one of the top centers in club history. Could he make his fourth straight Pro Bowl this year?
Kyle Kosier - If he starts camp 100 percent healthy, he should have the upper hand on the left guard spot. But it'll be tough to hold off Holland.
Montrae Holland - While he wants the starting job, Holland has begun a "backup plan," practicing on his center snaps just in case.
Cory Procter - Wasn't the best option as a starter, but he could be the best option as a backup; His $1.5 million salary could affect the team's decision on him.
Doug Free - Looks to be the favorite for the third tackle position. While it'll be tough for him to get a starting spot this year, the third tackle is active every week.
Pat McQuistan - Saw some time at guard, which could help him get a roster spot. If the Cowboys had an injury to a starting OT, he still might be the best option.
Robert Brewster - No pressure on the rookie to perform right away, but he could be a big surprise if he can compete early.
Ryan Gibbons - Spent last year on the practice squad; Knows the system but still fighting an uphill battle for a spot.
Michael Turkovich - Rookie free agent from Notre Dame needs to out-perform Brewster and play well in preseason games.
Greg Isdaner - With McQuistan moving to guard, it's getting crowded inside. Rookie free agents like Isdaner need to make the most of every practice rep.
Travis Bright - Ditto here. The BYU rookie was a productive college player but needs to get a break early. Practice squad might be best option.