Coach Mike Shanahan still isn't sure if Tashard Choice (hamstring) will play against the Cowboys this week. "How he's going to do this week, I can't tell you for sure," said Shanahan. "But he's feeling a lot more comfortable with our system. He's biting at the bit to get going. I think there's a big upside with him. But after a week of practice, I can't tell you for sure." Adding Choice to the whims of Shanahan will be just one more headache for Roy Helu owners.