Oregon's followup to last season's run to the College Football Playoff National Championship game begins Tuesday morning.
13 Ducks participated in Oregon's pro day Thursday at the Moshofsky Center.
Mark Helfrich agrees to a deal designed to keep him in Eugene at least through the 2019 season.
The competition to replace Marcus Mariota could have one more participant, with Vernon Adams potentially in the mix as a graduate transfer.
Oregon announced its newest recruiting class Wednesday, and also held a workout for the veterans that set the stage for the 2015 offseason.
Freshmen made a huge impact in the Oregon kicking game, led by placekicker Aidan Schneider, punter Ian Wheeler and do-it-all Charles Nelson.
The Ducks had to replace three starters from the 2013 team, but by midseason they hit on a unit that provided solid pass defense in 2014-15.
The Ducks mixed and matched personnel to take advantage of the run-stoppers, pass-rushers and coverage guys in the position group.
Oregon's defensive front featured towering ends DeForest Buckner and Arik Armstead, who formed a formidable wall down the stretch.
Despite enduring numerous injuries, Oregon protected Heisman Trophy winner Marcus Mariota and cleared a path to the national title game.
Oregon's receiving corps proved deep and talented in 2014, allowing the Ducks to overcome several injuries and keep the pass game dangerous.
With Byron Marshall shifting into an all-purpose role, Royce Freeman and Thomas Tyner got the bulk of the carries at running back in 2014.