07/22/2013 10:19 EDT | Updated 09/21/2013 05:12 EDT

Cowboys' Crawford goes does in first full camp practice, could be out with Achilles tear

OXNARD, Calif. - Dallas Cowboys defensive lineman Tyrone Crawford could be out for the season after the Windsor, Ont., native injured his Achilles tendon in the first full workout of training camp.

Cowboys executive vice-president Stephen Jones said the team was awaiting MRI results after the injury Sunday but feared it could be a season-ending tear.

Crawford went down during non-contact individual drills. He pounded the ground in anger and covered his face with his hands as he was taken off the field in a cart.

The second-year player is a backup who is listed as an end but can play tackle. He thanked his fans on Twitter, writing that their support was "very much needed right now."