India, Nov. 3 -- The Houston Texans quarterback has been ruled out of the Week 9 game against the Denver Broncos on Sunday. He sustained a concussion after hitting his head on the turf at the end of the second quarter. The team announced just after halftime that he would not return.

The incident occurred when Stroud scrambled for a six-yard gain and began to slide. As he went down, Kris Abrams-Draine made contact with Stroud's shoulder area, causing the quarterback's head to whip backward and hit the ground hard.

Officials initially threw a flag for unnecessary roughness, but after a review, the penalty was overturned. Replay showed that Abrams-Draine did not make direct contact with Stroud's head or neck.

Stroud stayed down for severa...