Deshaun Watson may have initially injured his right knee in the fourth quarter of the Houston Texans' loss at the houston Texans.

The Texans still think Watson tore the ACL on Thursday at practice, but are aware of a hit he absorbed in Week 8.

Frank Clark jumped over Texans running back Lamar Miller and rolled up on Watson, who immediately grabbed his right knee on the play. Watson finished the game, didn't complain about the injury after it, and did not get treatment on it last week, per sources.

Watson suffered a tear of the ACL on a non-contact play in practice.

"I can't be 100 percent sure," one doctor said of the chances that Watson tore his ACL against Seattle, "but I wouldn't be surprised. Something happened as he grabbed his knee. And if you look at it in slow motion, one mechanism of injury is there."