OXNARD, Calif. -- With all the Cowboys' offensive line injuries, sometimes when players make their practice debuts, it's like a new line is out there.

Mackenzy Bernadeau worked in team drills for the first time in training camp Thursday.

Cowboys owner/general manager Jerry Jones said he was pleased with the interior of the line. At one point, the Cowboys were missing four interior offensive linemen to injuries. Three are still out, but with Bernadeau returning, things are getting better.

The Cowboys signed two interior offensive linemen, Derrick Dockery and Daniel Loper, because the injuries to Kevin Kowalski and Bill Nagy will keep them out until into the regular season.

"Well, I like what Dockery was doing out there and of course Bernadeau," Jones said. "We've noted he's been doing some good things. He looked like a real veteran substantive guard out there. So with Bernadeau, Dockery, reps that our young guys have been getting out there, I'm not going to say it's a position of strength, but I sure like (it)."

The Cowboys have used young guards, Ronald Leary and David Arkin to fill in with injuries to Nate Livings and Bernadeau, who were the projected starters at guard.

Livings is out with a hamstring injury and should return at some point.

"I like where we are with and what we've done," Jones said regarding the interior of the offensive line. "Every one of these guys, relatively speaking, have real good size and that's a good thing for us. I'm pretty pleased and not looking in any other direction right now than what we got on the roster in the interior of our line."