The Bills have lost two defensive players for the rest of the game.
They ruled out linebacker Terrel Bernard with a right elbow injury. He returned to the sideline wearing a sling.
Bernard was injured with 10:27 remaining in the third quarter when he and Matt Milano tackled Texans running back Nick Chubb for a 1-yard loss.
Hairston left with 7:16 left in the third quarter to be checked for a concussion.
He was injured on Woody Marks’ 3-yard run.
The Texans have ruled out cornerback Ajani Carter with a hamstring injury.