The ' season may have just ended. Quarterback 's season is definitely over, after Saturday's 38-17 lo s to the Jacksonville Jaguars. Late in the third quarter, with Tenne see trailing Jacksonville 25-10, Mariota was sacked from behind by . It looked innocuous enough at the time, but the Andreas Athanasiou Jersey Titans' medical staff had to apply an air cast to Mariota's leg and he left the field on a cart.The hit that injured Mariota. Right ankle doesn't look good after he hits the ground. Chris Burke (@ChrisBurke_SI) The Titans Brendan Shanahan Kids Jersey initially called it an ankle injury. However, after the game Mike Mularkey told reporters that Mariota had suffered a fractured fibula. coach Mike Mularkey: "Marcus has a fractured fibula. Obviously Thomas Vanek Jersey he is out." Tenne see Titans (@Titans) Stepping in for Mariota: veteran journyeman , who had appeared in just two games this season and thrown just one pa s. Ca sel had some succe Brendan Shanahan Men Jersey s upon entering the game, going 13 for 24 for 124 yards with one touchdown and one interception. Mariota completed just 8 of 20 pa ses for 99 yards and a touchdown. Neither performance was good enough. It'll be Ca sel under center for the Titans in Week 17 against the Antti Tuomisto Men Jersey Texans, who can lock up the AFC South with a victory against the Bengals on Saturday night. If Houston can't get the win at home, their Week 17 matchup with Ca sel the Titans will be for the division title and the playoff spot that comes with it.