SEATTLE -- Washington spoiled seventh-ranked Oregon State's perfect season with a 20-17 win Saturday night at CenturyLink Field.
Travis Coons' 30-yard field goal gave the Huskies the winning points with 1:20 left, and Washington held off a last-gasp Oregon State drive that got as far as the Huskies' 38-yard line before stalling.
Oregon State quarterback Sean Mannion, who returned to the starting lineup after missing the previous two games following minor knee surgery, threw four interceptions. The takeaways allowed Washington (4-4, 2-3 Pac-12) to stay in the game despite being outgained 427-293 in total yards.
The final interception led to the go-ahead touchdown in the fourth quarter.
Marcus Peters picked off a pass to give the Huskies the ball at the Oregon State 30. A 29-yard pass from Keith Price to Kasen Williams put the ball at the 1, and Bishop Sankey's run on the next play put the Beavers ahead 17-10 with 8:19 left.
Quarterback Cody Vaz, who led Oregon State to wins the last two weeks over BYU and Utah, then replaced Mannion and immediately led the Beavers to the tying touchdown. Connor Hamlett scored on a 29-yard pass from Vaz with 4:58 to play. Oregon State (6-1, 4-1) moved 76 yards on seven plays in 3:11.
However, the Huskies quickly got in position for the winning field goal, driving 63 yards on eight plays.
Washington led 10-0 at the end of a first half that it dominated physically.
The Beavers, who trailed at the half for the first time this season, got back in the game early in the third quarter on a 53-yard pass from Mannion to Brandin Cooks. That capped a two-play, 83-yard drive.
Oregon State tied the game with 2:42 remaining in the third quarter on Trevor Romaine's 29-yard field goal following a 54-yard drive. A defender ran into Romaine on the play, which would have been a 5-yard penalty. However, after thinking about going for a fourth-and-1, Beavers coach Mike Riley decided to take the points and declined the penalty.
The Beavers entered the game 6-0 for the first time since 1907, and with USC's loss earlier in the day, they were harboring serious hopes of a BCS bowl. Oregon State has never started 7-0.
Washington kept its bowl hopes alive a week after a 52-17 loss at Arizona had some Huskies fans grumbling about the direction of the program under fourth-year coach Steve Sarkisian.
Washington got the lone touchdown of the half late in a second quarter on a 1-yard run by Sankey. The score came on a fourth-down play that occurred after the Huskies appeared to score on a fumble into the end zone by Kendyl Taylor that was recovered by teammate Cody Bruns.
However, Taylor was ruled down at the 1 after a review. Sarkisian decided to go for it, and Sankey burst over the right side for a score.
The game started sluggish under rainy skies in Seattle, each team playing conservatively early. Washington got on the board first when Travis Coons kicked a 45-yard field goal with 3:12 left in the first quarter.
Oregon State moved to Washington's 17 early in the second quarter, but Mannion then threw into coverage in the end zone. Huskies safety Sean Parker dived and picked off the pass in the end zone.
Washington, which was challenged by its coaches after a 52-17 loss at Arizona the previous week, set a physical tone throughout the first half. A hard hit by Parker led to another Oregon State turnover in the second quarter. Parker hammered Beavers receiver Markus Wheaton inside the Washington 20, the ball flying into the air and Huskies safety Justin Glenn picking it off, stopping another Oregon State drive.
Wheaton, the third-leading receiver in the conference, was down for a few minutes before walking off. He did not play the rest of the half.
After Washington took a 10-0 lead, Oregon State got its lone break of the half on a Sean Martin interception at the Huskies' 49-yard line. However, the Beavers were stopped on fourth-and-8 at the Washington 32 with 40 seconds left in the second quarter.
Washington had a 158-110 edge in total yards in the first half, including an 84-28 advantage on the ground.
NOTES: The Huskies have won their past 10 games in which the margin of victory was fewer than 10 points. ... Washington began the game with its sixth different starting offensive line in eight games this year. Sophomore Mike Criste got the start at right guard instead of James Atoe. Washington lost two starters for the season to injuries in the first two games, necessitating almost weekly shuffling up front. ... Oregon State's No. 7 AP ranking, the same as the team's BCS standing, was the Beavers' highest since they finished the 2000 season No. 4. That year, Oregon State went 11-1 and won the Fiesta Bowl under coach Dennis Erickson. ... Oregon State had won seven of the previous eight games in the series. ... The game was played at the home of the Seattle Seahawks, as Husky Stadium is being renovated. Husky Stadium will reopen for the beginning of the 2013 season. Oregon State defeated Washington State 44-21 at CenturyLink Field in 2011 in the Cougars' annual game in the stadium. ... Sun Bowl officials attended the game.