Backup: Ryan Fitzpatrick

Best-case scenario: Tennessee's new O-line helps protect Jake Locker and opens up more running room for Chris Johsnon. The Titans improve to an 8-8 record, still missing the playoffs but managing to gain back some of the dignity lost over the last few seasons.
Worst-case Scenario: The inexperienced O-line fails to protect Locker and tears the same shoulder he tore last season. Ryan Fitzpatrick takes over and Titans fans find out that it does actually get worse than 2012's 6-10 record. That and CJ2K hits the booth again.