IRVING, Texas – The Cowboys’ search for their best combination of offensive linemen has led Doug Free to slide inside to right guard.

Free, a tackle his entire career, has been getting reps at right guard this week. He worked there with the first-team offensive line during the early portion of Wednesday’s practice that is open to the media.

Mackenzy Bernadeau shifted over to left guard, with Jermey Parnell filling in for Free at right tackle. Left tackle Tyron Smith and center Travis Frederick remained in their regular spots.

During the offseason, owner/general manager Jerry Jones said Free might play guard, but the lineman focused solely on right tackle throughout training camp.

This could be the Cowboys simply working on a Week 1 contingency plan if left guards Ronald Leary and Nate Livings have not recovered from arthroscopic knee surgery.

More to come after coach Jason Garrett’s news conference.