After a promising second year, Mariota regressed heavily in his third season. He threw more interceptions than touchdowns, saw his YPA drop by half a yard and failed to top 250 yards passing 10 times in 15 games. His downfield passing reverted to the struggles he had as a rookie, arguably worse. He took fewer than three shots per game beyond 20 yards downfield, completing only 25.6 percent (27th) with a 42.4 passer rating, 32nd among the 34 quarterbacks with at least 20 attempts. Part of the problem was a heavy emphasis on the running game - the Titans ranked sixth in rushing percentage - at the expense of the passing game. That should be corrected this season with the arrival of offensive coordinator Matt LaFleur, the former Rams OC. A big part of LaFleur's offense is play-action, which should suit Mariota well after he led the league in passer rating (122.8) and yards per attempt (11.1) on play-action passes last season. Mariota intends to tweak his mechanics, too, as sloppy footwork led to passes sailing or dying, causing incompletions and interceptions. Health will go a long way. Mariota has not played a full season; last year a hamstring strain held him out Week 5 and limited his mobility the next few games. Delanie Walker, Rishard Matthews and Corey Davis provide upside for the passing game, and this offseason the Titans added pass-catching back Dion Lewis. It's time for Mariota to fulfill his potential.