Dunbar, who is expected to be a big part of the offense as a third-down back, is in a protective boot and could need 3-4 weeks to return, according to a source. Dunbar had a 43-yard catch against Arizona on Saturday but fumbled at the end of the play. He returned to the game and did not mention being hurt in the locker room after the 12-7 loss to the Cardinals.
Wide receiver Cole Beasley suffered a sprained foot on Aug. 9 at Oakland and has yet to return to practice. Running back DeMarco Murray missed six games last year with a sprained foot.
The Cowboys welcomed back guards Kevin Kowalski (knee) and Ray Dominguez (shoulder) to the practice field, increasing their interior line depth.
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