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Eugene, Ore. • Jordan Williamson hit a 37-yard field goal in overtime and No. 14 Stanford upset No. 1 Oregon 17-14, denying the Ducks a chance to clinch the Pac-12 North and derailing their straight shot at the BCS title game.

If both Stanford and Oregon win in their final games next weekend, both will finish with one conference loss, which means Stanford will win the head-to-head matchup and go to the Pac-12 championship for a chance to play in the Rose Bowl.

After winning its fifth straight, Stanford (9-2, 7-1) will play its finale at No. 17 UCLA, which defeated No. 21 USC 38-28 earlier in the day to claim the Pac-12 South. Oregon (10-1, 7-1) will play Oregon State in the annual Civil War rivalry game in Corvallis.

The loss snapped a 13-game winning streak for the Ducks, which was the longest in the nation coming into Saturday.

"It hurts and as I told them, you'd like to have some words that would take the pain out of it, but there aren't," Oregon coach Chip Kelly said. "We'll feel bad for a little bit of time and we'll bounce back from it."

Oregon's loss, coupled with No. 2 Kansas State's — they were also the top two teams in the BCS standings — means third-ranked Notre Dame is now the lone unbeaten team in the race for the BCS title game.

The Fighting Irish control their national championship run, with No. 4 Alabama and a couple of other Southeastern Conference teams also in the thick of it.

Oregon was the only Pac-12 team that Stanford hadn't defeated over the past two seasons. But the Cardinal's tough defense smothered the highest scoring team in the nation.

Alejandro Maldonado missed a 41-yard field goal for the Ducks to open overtime before Williamson's game winner.

Redshirt freshman Kevin Hogan threw for 211 yards and a game-tying fourth-quarter touchdown for Stanford, while Stepfan Taylor rushed for 161 yards on 33 carries.

UCLA 38, USC 28 • Brett Hundley passed for 234 yards and a touchdown and rushed for two more scores as No. 17 UCLA beat No. 21 USC in Pasadena, Calif., clinching the Pac-12 South title and emphatically snapping a five-game losing streak in their rivalry.

Eric Kendricks blocked a punt and made a fourth-quarter interception for the Bruins (9-2, 6-2 Pac-12), who overcame intermittent second-half rain and USC's star-studded lineup for a gutsy victory that puts them atop Los Angeles football.

Arizona State 46, Washington State 7 • Quarterbacks Taylor Kelly and Michael Eubank accounted for six touchdowns in Tempe, Ariz., and Arizona State became bowl eligible with a rout over Washington State that ended the Sun Devils' four-game losing streak.

Arizona State (6-5, 4-4 Pac-12) had failed in four tries to become bowl eligible, bogging down against some of the best teams in the conference.

Washington 38, Colorado 3 • Keith Price threw a career-best five touchdown passes and Washington overcame a slow start to whip hapless Colorado in Boulder, Colo., for the Huskies' fourth straight win.

Bishop Sankey atoned for a first-half fumble at the 1 by running through Colorado's defense for 139 yards and collecting 48 more on four receptions as the Huskies (7-4, 5-3 Pac-10) won consecutive road games for just the second time in the last decade.