Dallas Cowboys owner Jerry Jones was already worried about the interior offensive line and holding its breath about whether it would hold up in front of quarterback Tony Romo.
And that was before center Phil Costa left practice on Friday with a back injury. David Arkin took reps in his place on the first team.
The Cowboys don’t believe the injury is serious but it came at a bad time with just one practice remaining before the preseason opener against the Raiders.
It’s also another setback for the interior offensive line that is already without three players because of injury in guard Bill Nagy (ankle), center Kevin Kowalski (ankle) and guard Nate Livings (hamstring). Guard Mackenzy Bernadeau returned to practice this week for first team after being undergoing hip and knee surgeries in the offseason.
The Cowboys have not decided if he will play against the Raiders as they choosing to remain cautious.
It all Jones admittedly frustrated.
"I think frustration is probably good in this case," Jones said. I must tell you that I am holding my breath a little bit because I need the interior of this line to be a source of confidence for Tony and to feel good about his protection in there. We can talk about the running game. I know that helps protect him in our passing game. But I look at it principally by it beginning with protection for him. That’s got me a little angst right now, but I am liking some of the things I am seeing in there, although Costa raised his head late out here in the afternoon, but I don’t know how serious it is."
Clarence Hill | FWST
RELATED: Injury Report: Phil Costa hurts lower back
The Dallas Cowboys were just starting to get healthy and then center Phil Costa hurt his lower back and missed the last 45 minutes of practice Friday afternoon. David Arkin and Harland Gunn moved up the depth chart to get snaps. Costa’s status is uncertain, but it comes at a bad time with the Cowboys having just one more practice before the preseason opener at Oakland on Monday night.
- Nose tackle Jay Ratliff got some more snaps in practice Friday after getting — well sneaking — in one snap Thursday afternoon. Ratliff (foot) looked pretty good moving around on the field. After he came out, Ratliff had a chat with the trainers to talk about how he’s feeling. Ratliff is used to playing with power and quickness and he displayed that Friday.
- Tight end John Phillips didn’t practice in pads but did pat-and-go without a helmet in the walkthrough.
- Guard Mackenzy Bernadeau (hip and knee) worked with the first and second teams and showed some power and good lateral movement during the practice.
Editors Note: An in-depth post will be available in the morning about this issue, with related video and articles.