Marcus 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 and will .
The Tennessee Titans quarterback had an air cast placed on his right leg after his foot was bent awkwardly on a sack by Jags defensive lineman Sheldon Day.
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.
