Sean Mannion went into last year's fall camp uncertain whether he would be the starter. This season, the uncertainty centers on who will emerge as his go-to receiver.

Mannion set a Pac-12 season record for yards passing with 4,662 and threw an Oregon State-record 37 touchdown passes, third-most for a single season in conference history.

The fifth-year starter has 10,436 career yards passing and could break Matt Barkley's record of 12,274 before the end of the season.

A drop-back passer who fits perfectly into coach Mike Riley's pro-style offense, Mannion is on the preseason watch lists for a slew of honors, including the Walter Camp, Davey O'Brien and Maxwell awards.

But he'll need a new favorite target now that Brandin Cooks has moved on to the New Orleans Saints.