CORVALLIS — Devon Collier had 16 points and Oregon State held off a second-half run by Washington for a 74-66 win on Wednesday night.
Eric Moreland added 12 points and 10 rebounds off the bench for the Beavers (11-8, 1-5 Pac-12), who saw a 20-point first-half advantage shrink to one but never gave up the lead.
C.J. Wilcox had 23 points and seven rebounds and Aziz N'Diaye added 10 points and 10 rebounds for Washington (12-7, 4-2).
Washington chipped away at a 10-point halftime deficit early in the second half.
The Huskies closed within 41-35 as Wilcox closed out a 6-0 run with a shot from outside.
A Wilcox 3-pointer later made it 49-45 Oregon State. Wilcox hit another from 3-point range with 12:16 left that got Washington within 53-52.
The Beavers extended the lead to 61-55 on Roberto Nelson's 3-pointer with 8:17 remaining.
Oregon State later scored five straight points, with Ahmad Starks' 3-pointer and Collier's two free throws making it 66-57 with 5:11 remaining.
Washington got no closer than six from there, and the Beavers led by as many as 10 in the closing minutes.
Oregon State shot 26 of 59 overall from the field, while Washington was 25 of 53.
Oregon State jumped to an 11-1 run behind five points from Starks.
The Beavers, on their way to their most first-half points in a Pac-12 game this season, kept the pressure on, going ahead 20-9 on Olaf Schaftenaar's 3-pointer.
Oregon State took its biggest lead of the half at 34-14 on Collier's dunk off a steal with 5:28 before intermission.