WSU meets Oregon Thursday at 11:30 a.m. on the Pac-12 Networks.
Ian Sagdal's RBI single in the seventh gave Washington State a 6-5 lead and Ian Hamilton recorded a two-inning save as the Cougars defeated UC Riverside, 6-5, in the series finale Sunday.
The Anaheim, Calif., senior broke the 100 free record previously held by former Olympian Rugile Mileisyte.
Abby Regan broke her own school record in the women's mile Saturday at the MPSF Championships.
Washington State knocked off USC 68-62 Saturday at Beasley Coliseum.
Washington State moves to 9-2 after a 6-1 victory over GU and a 5-2 win over UND Saturday.
Jared Morton retired all eight batters he faced to earn his first win of the season as UC Riverside posted a 4-1 victory over Washington State Saturday afternoon at Bailey-Brayton Field.
The Cougars set 10 career-best marks and qualified seven swimmers for the evening's finals session.
Joe Pistorese hurled seven shutout innings to lead WSU to a 3-0 victory, Friday.
Terrance Chambers took third place in the men's 200m dash at the MPSF Championships Friday night.
The women's golf team will compete in the Bruin/Wave Invitational, March 2-3.
Washington State faces USC Saturday at 3 p.m. on the Pac-12 Networks.