I would submit that their substitute center was more of a problem than their substitute QB.
You obviously didn't watch much Oregon football this year. With Adams they were a borderline Playoff team. Without him, well hopefully you saw the 2nd half of the Alamo Bowl. A center does not influence 31 unanswered points that much.
Did you see all of the fumbled and/or mishandled snaps? A few less of those and Oregon gets another TD and wins this game.
http://tinyurl.com/qhojkn4 Quote from this article on the impact of the substitute center:
"Oregon’s starting center also went out with an injury in the first half and his replacement was guilty of 12 low snaps that came at Lockie’s shoe tops or bounced on the ground — in one instance nullifying a touchdown pass that was called back because Lockie had to touch a knee to the turf to corral the low snap before he threw the pass."