Oregon State 4, Washington State 3
At Goss Stadium
The top-ranked Beavers rallied from a 3-1 deficit to down the visiting Cougars on Friday.
A single and four walks produced the tying and winning runs for Oregon State in the bottom of the ninth off of Washington State clser Scotty Sunitsch. Steven Kwan walked on a full-count pitch to force home the tying run and Jack Anderson walked on a 3-2 count to bring home the winning run.
The Beavers, who have clinched the Pac-12 title, improved to 43-4 and 25-3 in conference play. The Cougars are 24-24 and 10-15.
Oregon State is one win shy of Arizona State's Pac-12 record of 26 league wins set in 1981.
Kwan and Trevor Larnach, who opened the ninth inning with a single, each went 2 for 4 for the Beavers. OSU finished with seven hits.
Luke Heimlich (9-1) went the distance for the Beavers. He struck out eighth without a walk and scattered eight hits.
WSU scored twice in the top of the sixth to take a 3-1 lead. Oregon State pulled within 3-2 in the eighth on an Adley Rutschman sacrifice fly.
The weekend series continues at 1:05 p.m. Saturday.
Oregon 6, USC 2
At Los Angeles
The Ducks pounded out 13 hits and got a solid pitching performance from David Peterson, ending a seven-game skid with the Pac-12 win.
Peterson (11-3) struck out nine over seven innings. He scattered five hits and walked one.
Oregon is 27-22 overall, 10-15 in Pac-12 play. USC is 19-30 and 6-19.
Jake Bennett (3 for 4), Morgan McCullough (3 for 5) and Gabe Matthews (3 for 5) led the Ducks' offense. McCullough homered and finished with three RBIs and two runs.
Oregon had four singles and a sacrifice fly in a three-run fourth inning.
The three-game series continues at 4 p.m. Saturday.
Loyola Marymount 7, Portland 3
At Joe Etzel Field
The Lions used a five-run third inning to win the West Coast Conference game.
The Pilots fell to 10-39-1, 5-20 in WCC play. LMU is 35-16 and 18-7.
Jason Rosen was 2 for 4 with a home run and three runs scored for Portland. Cody Hawken, Michael Forgione and Kevin Wade each went 2 for 4 for the Pilots with Hawken and Forgione hitting doubles.
Jimmy Hill and Billy Wilson each homered for Loyola Marymount.
Corbin Powers (1-6) allowed six runs in six innings on the mound and took the loss.
At Jane Sanders Stadium
Oregon 13, Illinois-Chicago 0
The third-seeded Ducks opened the post season with a run-rule win in front of 2,333 fans.
Oregon (48-6) will play Wisconsin at 2 p.m. Saturday with the winner advancing to Sunday's regional championship game. The loser of that game must play a loser-out game at 7 p.m. Saturday then win twice on Sunday to advance to the Super Regionals.
Illinois-Chicago and Missouri play a loser-out game at 4:30 p.m. Saturday for the right to play again in the 7 p.m. game.
Oregon scored nine runs in the fourth inning to bust open the game.
Freshman Maggie Balint gave up only two hits and struck out nine over five innings to earn the pitching win, her 20th win of the season.
Freshman Shannon Rhodes went 3 for 3 with an RBI and three runs.
It was the 11th consecutive win for the Ducks.
Wisconsin 7, Missouri 2
Chloe Miller and Brooke Wyderski each had two hits and three RBI to lead the Badgers past the Tigers in Friday's Eugene Regional opener.
At Waco, Texas
James Madison 3, Oregon State 2
The No. 11/12-ranked James Madison Dukes scored the winning run with two outs in the bottom of the seventh to complete a rally in the opening game of the Waco Regional.
Oregon State (28-26) will play Kent State in a loser-out game on at 1:30 p.m. Saturday. James Madison (51-6) will face host Baylor on Saturday. Baylor beat Kent State 1-0 on Friday.
Taylor Newton singled with the bases loaded to bring home the winning run. The Dukes had two hits and the Beavers committed one error in the seventh.
James Madison tied the score at 2-2 with single runs in the fourth and sixth innings.
Oregon State, making its 13th NCAA softball tournament appearance, scored its two runs in the top of the first inning. McKenna Arriola and jessica Garcia opened the game with singles and both scored on a double by Natalie Hampton.
Six different Beavers each had one hit in the game.
Taylor Cotton (14-10) went the distance pitching for Oregon State, allowing seven hits wile striking out five and walking three.
For James Madison, Megan Good improved to 37-1 pitching this season.
at Sugar Grove, Illinois
Oregon is 23rd among the 24 teams after the first day of the NCAA Women's Golf Championships at Rich Harvest Farms.
Playing in stormy weather on Friday, the Ducks came in at 45-over par 333 to open the tournament. Oregon will try to climb into the top 15 teams to advance beyond Sunday's third round.
The Ducks managed only two birdies on the day.
Scoring for the Ducks on Friday were sophomore Kathleen Scavo (10-over-par 82) senior Cathleen Santoso (11-over 83), senior Marcella Pranovia (12-over 84) and sophomore Petra Salko (12-over 84).
Oregon State junior Susie Cavanagh, competing as an individual, shot a 7-over 79 on Friday and is tied for 44th place. After a tough front 9, Cavanagh shot even-par 36 over the second nine.