IF...

BYU stays humble
BYU stays focused
BYU plays disciplined, technique sound football
BYU with zero turnovers or managing TO well enough to win
BYU winning 3rd down
BYU defensive 7 contain Nix and Oregon running attack
BYU secondary, don't give up YAC and contain well in midrange Oregon passing attack
BYU defense forcing fumbles
BYU Oline, gives Jaren Hall plenty of time to hit his targets

Side notes
BYU fans wearing school colors, always standing and causing O fans to take notice
BYU fans, always positive and encouraging

That said, BYU wins by 14 points. GO Cougars!!