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 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.
Stanford (9-2, 7-1) visits No. 17 UCLA, the Pac-12 South champion. Oregon (10-1, 7-1) plays Oregon State in the annual Civil War rivalry game in Corvallis.
The Ducks had their 13-game winning streak snapped, which was the longest in the nation going into Saturday. Stanford won its fifth straight game.
Oregon's loss, coupled with No. 2 Kansas State's — they were the top two teams in the BCS standings, with K-State 1 and Oregon 2 — means Notre Dame is the lone unbeaten 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.
Redshirt freshman Kevin Hogan threw for 211 yards and a tying fourth-quarter touchdown for Stanford, and Stepfan Taylor rushed for 161 yards on 33 carries.
Down 14-7, Stanford went for it on fourth and 1 on the Oregon 12 with 2:17 left in regulation and Ryan Hewitt leaped for the first down. Hogan hit Zach Ertz with a 10-yard scoring pass to tie it at 14 with 1:35 to go. Ertz fought to gain control of the ball with a defender as he fell to the turf on top of a Ducks player. The play was initially ruled incomplete, but a video review overturned it.
Despite a pass interference call that gave them a first down, the Ducks were forced to punt on the ensuing series.
The Cardinal had the nation's best run defense going in, allowing 54.8 yards a game. Oregon had the country's third-best rushing offense, averaging 325 yards.
Stanford held Ducks running back Kenjon Barner, who was averaging 136 yards rushing, to 66. Overall, the Ducks managed 198 yards on the ground. Oregon's top rusher was quarterback Marcus Mariota with 89 yards.