Comeback Player of the Year has always been light on details and criteria, but whatever the measure it would be hard to give the award to anybody other than Ryan Tannehill this season for what he did with the Tennessee Titans.
The Titans were 2-4 early in the season with Marcus Mariota playing his way to the bench. He had been flirting with it for weeks, but Mike Vrabel finally made the switch and pulled him for Tannehill, whose modest contract the team had traded for in the offseason just to provide some cover presumably in case Mariota got hurt — not as a viable alternative option.