CORVALLIS - Senior Rachel Rourke hit .373 with 31 kills to lead the Oregon State volleyball team to a 3-1 upset of No. 18 Arizona at Gill Coliseum on Saturday night. Set scores were 30-28, 23-25, 25-16 and 25-22.

"Rachel (Rourke) for a while didn't even have an error in the match, and I think she really played well," OSU coach Terry Liskevych said. "The freshmen did a great job. Megan (McBride) also did a great job at setting.

"We had four freshman right there on the floor, which will build great things. We hit better, we sided-out better. The only negative thing was we missed too many serves. But we persevered, which was the main thing."

McBride set career bests for kills (7), digs (6) and assists (38). Rourke recorded her fifth double-double of the season with 31 kills and 12 digs; senior Lexie Rathgeber set a new season-best for blocks with eight and freshman Camille Saxton tied her career-best for kills with seven.

Arizona is the fourth ranked team Oregon State has defeated this year.

The Beavers (12-12, 3-9) hit .299, nearly a season-best, while holding the Wildcats (17-7, 6-7) to .156, and OSU outblocked Arizona 14-4.

Sophomore Betsy Devich dug a match-high 19 balls with junior Jill Sawatzky and freshman Alyssa O'Neil adding 15 each.

In the fourth set, there were six ties before OSU took the one lead change at 6-5, again, behind a Rathgeber and McBride block. The Beavers led 20-16, but Arizona continued to battle, tying things at 21 all. But two unforced Wildcat errors, coupled with kills by Rourke and Sawatzky put the match away.

The Beavers play at No. 13 California on Friday and No. 5 Stanford on Saturday.