Published: Oct 28, 2012 2:00 AM EDT
Updated: Oct 28, 2012 6:32 AM EDT

SEATTLE (AP) - Bishop Sankey ran for 92 yards and two touchdowns, Travis Coons kicked a 30-yard field goal with 1:20 left and Washington took advantage of four interceptions from Oregon State's Sean Mannion in a 20-17 upset of the seventh-ranked Beavers on Saturday night.

Oregon State (6-1, 4-1 Pac-12) was trying for the first 7-0 start in school history. Instead it became the second AP Top 10 team to be upset by the Huskies at home this season. Washington knocked off then-No. 8 Stanford 17-13 in late September.

Mannion, returning from minor knee surgery, threw interceptions on consecutive possessions early in the fourth quarter after Oregon State had rallied from a 10-0 halftime deficit to pull even with a dominating third quarter. The last of Mannion's four picks was snagged by Marcus Peters and two plays later Sankey scored from the 1 to give Washington (4-4, 2-3) a 17-10 lead.