STANFORD, Calif. — Kathryn Plummer blasted 21 kills, and the No. 2 Stanford volleyball team solidified its perch atop the Pac-12 Conference with a four-set victory over No. 17 Oregon on Thursday.

The Cardinal (23-1, 15-0 Pac-12) won their 30th straight match at Maples Pavilion with the 26-24, 25-22, 22-25, 25-11 win. The third-set loss was just their seventh lost set against Pac-12 foes this season.

The Ducks (16-9, 9-6), meanwhile, drop into sole possession of fourth place with the defeat, the second to the Cardinal in the past three weeks.

Stanford finished with a .259 hitting percentage to Oregon's .171. Meghan McClure had 10 kills and 14 digs for the Cardinal while Jenna Gray dished off 47 assists and Courtney Bowen finished with 10 blocks.

Ronika Stone and Lindsey Vander Weide each belted 11 kills for Oregon and Willow Johnson added 10. August Raskie had 47 assists and Brooke Nuneviller finished with 18 digs.

Next up for Oregon will be California at 5 p.m. Saturday in Berkeley.

The Ducks, who defeated the Bears in three sets last month in Eugene, are looking for a strong finish to the season so they can land the home court in the early rounds of the NCAA Tournament.