The Cowboys don't have too many positions with huge question marks at the starting spot, but guard is certainly one of them.
And it's actually more than the guard spot, but the interior line, too.
The latest injury to Bill Nagy, a backup center and guard, has put the Cowboys in an even tighter spot regarding depth. Nagy suffered a high-ankle sprain and the Cowboys were still waiting for MRI results after Tuesday's practice.
Still, he'll likely be out 2-4 weeks if not longer. The Cowboys have already been without Mackenzy Bernadeau all summer because of a hip injury that required surgery. Bernadeau seems to be close to returning but hasn't yet.
Kevin Kowalski has been out with an ankle injury and doesn't appear close to returning soon.
Both Kowalski and Nagy give the Cowboys backup depth at both center and guard.
Now, it leaves Harland Gunn and possibly David Arkin as the backups to Phil Costa. Both players worked on shotgun snaps with Costa after Tuesday's practice.
But then again, Arkin is also trying to win the starting right guard spot with Bernadeau yet to practice. Arkin and rookie Ron Leary are taking turns with the first-team offense. Since the pads haven't come on yet, it's hard to really tell how anyone is doing, especially in the trenches.
But it's a numbers game and the Cowboys are getting pretty low in the middle, especially with those versatile guys.
It's early to worry about anything – or to get excited about much. But if Arkin and Leary are the two best options at guard, and Harland Gunn is backing up Costa, it's not exactly what the Cowboys had in mind when they planned out how to keep Tony Romo on his feet.