Out of the Power 5 conference championship games, Oregon was the only team to pull an upset, although Baylor tried their absolute best. Unfortunately for Utah, their 37-15 loss didn't just mean that they wouldn't be Pac-12 champs, but also that they would miss the playoff, since LSU would go on to trounce Georgia the next day in the SEC Championship Game.
It's a really tough break for the Utes, who had their best team in years. In fact, looking at CollegeFootballData's Team SP+ trends, this was their second-best team since 1970! But Oregon decided to just run all over the Utes, while mixing in a few explosive passes and big defensive plays too.