I understand that they want a couple of backup centers for preseason games, but if you are absolutely counting on a player to be your starting guard, he's not the one you are going to give center reps. I'm not saying it means Dallas doesn't think Cooper will win the starting job, just that it means the Cowboys haven't penciled him in to the point where they're not giving the other players a look.
I both like this and don't like it. I don't like it from the aspect that I would feel better about having a clear-cut starter who locks down the position from Day 1, much like Smith did, Frederick did and Martin did. I like it from the aspect that it appears that the Cowboys are going to allow players to compete for the position, which means it isn't being handed to anyone, and I feel there's a good chance out of the three primary candidates that we can find a solid starter.