Other terms of the trade Tuesday weren't immediately available. The person spoke on condition of anonymity because the deal hadn't been announced.
Brandon Weeden is expected to start Sunday at home against Arizona, but Cassel is a veteran with far more experience than the fourth-year pro. Before the trade, owner Jerry Jones said on his radio show that Weeden was his starter. The Cowboys appear to be all-in despite being banged up on the offensive side of the ball. The NFC East is looking weak and Dallas' two wins at this point in the season look pretty big.