The Cougars, who made all 15 of their free throws, snapped a three-game losing streak while handing Oregon State its first conference defeat. The Ducks (11-4, 4-1) had won their previous seven games.

Victoria Harrod grabbed 12 rebounds and handed out six assists for Washington State (8-8, 3-3), which rallied from a 33-26 halftime deficit.

Brianne Meharry scored 17 points and Ndidi Unaka added 15 off the bench for Oregon, which was outrebounded, 38-32.

The Ducks forced 21 turnovers but shot only 44 percent (28-of-64) from the field and went just 5-of-12 from the line.