Follow live: Watson, Texans take on Brees, Saints

The Cowboys started the game off on the right foot, deflecting a Russell Wilson pass and then bringing him down on an Aldon Smith sack. Then things changed and on third down on defense, DE Dorance Armstrong took a false step, allowing Chris Carson to the outside for a huge gain on third-and-one. QB Dak Prescott checked out of a pass, and Ezekiel Elliott slipped in the end zone and was called for a safety. On that play, it appears center Joe Looney hurt himself, because after the Seahawks failed to get a first down, rookie fourth-round pick Tyler Biadasz snapped for the first time as a professional.

In an era of quarterback preservation, the NFL was supposed to be past the type of injury that Bengals rookie quarterback Joe Burrow suffered on Sunday.