The Jacksonville Jaguars' season took another turn for the worse Sunday when Trevor Lawrence sustained a concussion on a tackle by Houston Texans linebacker Azeez Al-Shaair -- which the quarterback's teammates described as a "dirty hit.

Jacksonville Jaguars quarterback Trevor Lawrence was carted off the field after taking a violent elbow to the facemask from Houston linebacker Azeez Al-Shaair.

Jacksonville Jaguars quarterback Trevor Lawrence was carted off the field after taking a hard hit midway through the second quarter of Sunday's Week 13 loss to the Houston Texans. Lawrence took a second-and-7 snap and scrambled up the left side of the field for a 6-yard gain.