EUGENE — Cadyn Grenier's fourth-inning single accounted for the game's lone run as the top-ranked Oregon State baseball team defeated Oregon, 1-0, Saturday night at PK Park, sending the Beavers to a three-game sweep.

Grenier fouled off a pair of pitches from Oregon starter Matt Mercer on 2-2, then drove the seventh pitch of the at bat to center field. Christian Donahue, who had walked to open the inning, stole second with two down, and then scored when he beat the throw from Ducks' center fielder Jake Bennett.

By earning the sweep, Oregon State became the first visiting team in the Civil War to sweep a three-game series since Oregon re-instated its program in 2009.

Jake Thompson and Brandon Eisert combined to hold Oregon to three hits and three walks. Thompson started, going 6 2/3 innings, striking out five, and in the process, earned his 11th win of the season, which is now tied with Loyola Marymount's Cory Abbott for the nation's lead.

Eisert followed Thompson with 2 1/3 scoreless innings of his own for his fourth save of the season. The freshman faced one batter over the minimum.

Mercer was charged with the loss, dropping to 5-6. He allowed eight hits and four walks with five strikeouts in six innings.

Softball

OREGON 9, STANFORD 0, 5 inn.: At Stanford, Calif., third-ranked Oregon closed out the regular season with its 10th straight win and a sweep.

The Ducks (47-6, 17-6 Pac-12) tallied eight runs on five hits with no errors. Oregon ends the regular season second in the Pac-12 standings, a half game back of Arizona.

Next up, Oregon is in line to host a regional next weekend at Jane Sanders Stadium. The Ducks will learn their seed during the NCAA Tournament selection show today.

Track and Field

PAC-12 CHAMPIONSHIPS: At Eugene, Oregon collected three individual titles in the Pac-12 Championship meet at Hayward Field, and put itself in position for more trophies today, when the Ducks will try for their ninth consecutive sweep of the team titles.

Edward Cheserek won his seventh overall conference title and second straight in the 10,000 meters, finishing in 29 minutes, 11.76 seconds and two places ahead of teammate Tanner Anderson. Damarcus Simpson gave the Ducks a win in the long jump, leaping 26 feet, 1 inch, and Mitch Modin finished eighth, six days after winning the decathlon title in the multi-events portion of the meet. They helped Oregon head into today atop the team standings with 69 points.

On the women's side, freshman Rhesa Foster made it a sweep of the long jump for Oregon, leaping 20-6 1/2. Teammate Chaquinn Cook was fourth, and the Ducks also picked up points from Freda Berge in the steeplechase, Annie Whitfield in the javelin and Maggie Schmaedick in the 10,000 to finish the day with 24, tied for fifth at the close of action Saturday.

Oregon State senior Kara Hallock took third place in the long jump on Saturday.

Hallock flew 19 feet, 10.75 inches on her second jump to assume second place and she fell just one spot over the subsequent four rounds. It was the second-longest jump in school history, exceeding her previous No. 2 mark by 1.25 inches.