Tony Romo re-injured his left shoulder on the last play of the third quarter in Thursday's blowout loss to the Carolina Panthers.
Romo's shoulder took the brunt of the pressure on a Thomas Davis sack. The Dallas Cowboys quarterback immediately grabbed the shoulder and pounded the turf in frustration. Down for a minute or two, he eventually walked off holding his left arm gingerly against his chest.
Romo immediately departed for the locker room to undergo X-rays.
"The X-rays were inconclusive. So we don't know that much at this point," head coach Jason Garrett told reporters after the game.