Mariota finished the 2015 season with 2,818 passing yards, 19 touchdowns and 10 interceptions after missing Tennessee's season finale in Indianapolis. The rookie quarterback also rushed 34 times for 252 yards and two touchdowns.

Expectations were high for Mariota after the Titans selected him second overall in the 2015 NFL Draft, but his rookie season left many questions unanswered. He was unsurprisingly inconsistent, throwing for three or more touchdowns in a game four times, but also failing to pass for a score on five occasions. Mariota developed a reputation as a dual-threat quarterback at Oregon, so his relatively pedestrian rushing total was disappointing, although knee injuries that forced him to miss four games surely inhibited his running ability at times. The 22-year-old's future looks bright, and the Titans could greatly aid his development by acquiring another strong target in the passing game to play alongside tight end Delanie Walker.