With the win, USC improved to 12-5, 7-3 in the Pac-10. Arizona fell to 12-6 and 6-4.
The Cats were led by junior middle blocker Marisa DaLee, who posted 20 kills and hit .731, the fifth-best hitting percentage in Arizona history. DaLee has recorded five of the 14 best percentages by a Wildcat ever. Sophomore setter Dana Burkholder came within three kills of her first career triple-double, registering 51 assists and a match-high 20 digs. The Cats were hurt by 19 service errors.
Arizona returns to action Friday evening, when the Cats play host to sixth-ranked UCLA at 7 p.m. at the McKale Center.