FRISCO, Texas (AP) — Dallas rookie Ezekiel Elliott appears set for his preseason debut against Seattle after the running back taken fourth overall by the Cowboys missed most of training camp with a hamstring injury.

Lance Dunbar was cleared medically this week following major knee surgery last year, and free agent Alfred Morris is shaping up as a solid insurance policy.

The Dallas running game looks to be fairly deep behind one of the NFL's best offensive lines, and that's without last year's leading rusher, Darren McFadden. He's been out nearly three months after breaking an elbow in a household accident.

Defensive tackle Tyrone Crawford is being evaluated for a concussion after hitting his head during practice Sunday. It was the first indoor practice for the Cowboys at their new facility.