Mettenerger was the second quarterback behind rookie Marcus Mariota during a running walk-through Tuesday when the Titans opened up the first of 10 organized team activities, The Tennessean reports.

Mettenberger was the second quarterback behind rookie Marcus Mariota during a running walk-through Tuesday when the Titans opened up the first of 10 organized team activities, the Tennessean reports.

Analysis:

Mettenberger, who started six games for the Titans in 2014, will serve as the backup quarterback this season. Titans head coach Ken Whisenhunt wasted little time declaring Mariota the starter after he was drafted with the second pick in the 2015 draft.