DE Arik Armstead, Oregon: The Ducks already have a feared pass rusher in 6-7, 241-pound senior Dion Jordan, but they hope another defensive end with a power forward's frame will chase Pac-12 quarterbacks this season. Armstead is 6-8 and 290 pounds, so he could be especially potent at end when the Ducks use a 3-4 look. Given Ducks defensive coordinator Nick Aliotti's affinity for hockey-style line changes on his defense, expect Armstead to log plenty of snaps as a freshman even if he doesn't start.