Jordan Loveridge and Brandon Taylor chipped in 14 points apiece for the Utes (13-17, 5-13), who won consecutive Pac-12 games for the first time since joining the league. It also marked the first time Utah beat a ranked Pac-12 opponent in league play.
The victory marks Utah's first win over a ranked team since it beat #20 Illinois in 2008.
E.J. Singler had 21 points and seven rebounds to lead Oregon (23-8, 12-6), which finished in a second-place tie behind UCLA for the Pac-12 regular-season championship.
The Ducks trailed from start to finish and often made things easy for Utah, which dominated inside. The Utes held a 31-28 edge on the boards and a 34-21 advantage on points in the paint. They also forced the Ducks to commit 15 turnovers and scored 21 points off those miscues.
Utah got off to a blistering start and kept it up throughout the first half. The Utes shot 65.5 percent from the field and pressured Oregon's backcourt into turnovers. Utah forced the Ducks to cough it up nine times before halftime. Eight of those were steals by the Utes.
Cedric Martin turned one steal by DuBois into a fast-break layup that capped a game-opening 9-0 run for the Utes. After the Ducks cut the lead back to three, Loveridge stole the ball and helped set up a jumper by Washburn that gave Utah a 15-10 lead.
Oregon stayed within striking distance by heating up on the perimeter. The Ducks made their first three 3-pointers. The last one from Dominic Artis drew Oregon to 21-20 with 11:27 remaining in the first half.
Martin answered with a 3-pointer on the other end to spark a 9-2 Utah run. DuBois capped the spurt with a driving layup that gave Utah a 30-20 lead with 9 minutes left before halftime.
After Oregon trimmed the deficit to six again on a pair of free throws and a basket from Ben Carter, Utah closed the half on a 10-2 run. Washburn capped it by converting a three-point play with 2.9 seconds left to give the Utes a 44-30 lead going into the locker room.
Washburn started the second half the same way he ended the first. He converted another three-point play in the opening minute that gave the Utes a 47-30 lead.
Oregon rallied and trimmed the deficit to single digits when Artis hit a 3-pointer to make it 55-47 with 11:05 left. Another 3-pointer from Singler made it 60-54 with 7:30 to go.
DuBois steadied the ship for Utah. He scored a pair of baskets to push the lead back to 10. Brandon Taylor then added a layup off a long rebound and a jumper to cap a 10-2 run that gave the Utes a 70-56 cushion with 3:28 remaining.
- SLIDESHOW: Utes defeat Oregon Ducks