The Facts: Mariota suffered a fractured fibula in the third quarter of Saturday's loss to the Jacksonville Jaguars, coach Mike Mularkey told reporters. He is out for the remainder of the season.

Diehards Line: Mariota was carted off the field and immediately ruled out. Matt Cassel took over under center. Mariota struggled before the injury, completing 8 of 20 passes for 99 yards and a touchdown. The Titans quarterback couldn't connect deep and was off target early as Tennessee dug itself a big hole. The injury is a brutal blow to the Titans' playoff hopes. Tennessee trailed 25-10 when the injury occurred, and went on to lose 38-17. As a result, the Houston Texans can clinch the AFC South with a win Saturday night.