Oregon State 5, Oregon 4
At PK Park
The top-ranked Beavers held off the Ducks to clinch the Pac-12 pennant and give coach Pat Casey his 1,000th career win.
Oregon State freshman Mitchell Verburg struck out Oregon freshman Ryne Nelson with the bases loaded in the bottom of the ninth to secure a one-run win on Friday.
Oregon State improved to 40-4 and 23-3 in the Pac-12. Oregon fell to 26-20 and 9-14.
Steven Kwan had three RBIs, and the Beavers scratched out five runs on only five hits.
Max Engelbrekt pitched 3 2/3 innings in relief to improve to 3-0. Verburg earned his second save, coming on for Jake Mulholland with one out in the ninth.
The Ducks scored a run in the eighth off of Mulholland on consecutive singles from Spencer Steer, Gabe Matthews and Tim Susnara with one out, but were unable to get the tying run home from third.
In the bottom of the ninth, A.J. Balta was hit by a pitch and Kyle Kasser singled with one out to put runners at the corners. Verburg replaced Mulholland and got Matthew Dyer to pop out on a bunt attempt for the second out.
Steer was hit by a pitch to load the bases. Nelson struck out swinging on a full-count pitch from Verburg to end the game and set off a Beavers celebration on the Ducks diamond.
Ducks pitching ace David Peterson fell to 10-3. In the top of the fifth, the Beavers drew three walks and scored three runs off of Peterson. Kwan hit a two-run double and later scored on a sacrifice fly to put PSU up 5-3.
Peterson had not walked more than two in any game this season. In five innings, Peterson finished with four walks and five strikeouts and four of the five runs against him were earned.
Oregon scored one in the bottom of the first. Dyer doubled and later scored on a throwing error.
Oregon State tied it 1-1 in the top of the second. Adley Rutschman reached on a throwing error than scored on an error.
The Beavers took a 2-1 lead in the top of the third as Cayden Grenier singed, took second on a pickoff throwing error, went to third on a Nick Madrigal base hit and scored on Kwan's sacrifice bunt.
The series concludes with a 7 p.m. Saturday game at PK Park.
BYU 11, Portland 3
At Provo, Utah
The No. 18 Cougars built a 9-0 lead through four innings on their way to the win.
The Pilots fell to 10-36-1, 5-18 in the West Coast Conference. BYU is 31-15 and leads the WCC at 19-4.
Matt Kelly went 2 for 3 for Portland, which finished with six hits.
BYU pounded out 18 hits off of three Pilots pitchers. Grady Miller (1-8) was touched for 14 hits in four innings on the mound for Portland, giving up 10 runs (eight earned).
Oregon 4, Memphis 2
At College Station, Texas
The 24th-ranked Ducks advanced to an NCAA regional final with Friday's win over No. 34 Memphis.
Oregon (19-6) will face host and No. 12-seeded Texas A&M at noon Saturday, with the winner advancing to the round of 16. The round of 16 takes place on May 18 in Athens, Georgia.
The Ducks, who won an NCAA tournament match for the first time last season, have never advanced past the round of 32.
Oregon won the doubles point and three of the five completed singles matches to beat the Tigers.
In No. 1 singles, 24th-ranked Thomas Laurent of Oregon defeated No. 82 Ryan Peniston 7-5, 6-4.
Also winning singles matches for the Ducks were Simon Stevens and Cormack Clissold, both of whom dropped the first set. Stevens beat Andrew Watson 3-6, 6-1, 6-4. Clissold beat Jan Pallares 1-6, 6-2, 6-2.
Oregon won two of the three doubles sets to pick up the doubles points. Jayson Amos and Armando Soemarno of Oregon beat Watson and Kai Lemke 6-3. Larent and Clissold teamed to defeat Felix Rauch and Ryan Peniston 6-4.
Oregon 8, Stanford 0
At Stanford, California
The Ducks had two three-run innings on their way to a run-rule win in five innings over the Cardinal on Friday.
Oregon improved to 46-6 overall, 16-6 in Pac-12 play. Stanford is 19-31 and 2-21.
Shannon Rhodes went 2 for 3 with three RBIs and two runs scored for the Ducks.
Alexis Mack had a hit and two walks and scored three times for Oregon.
In the top of the first, Rhodes hit a two-run single with two outs then scored on a Mia Camuso infield single.
Miranda Elish (9-0) pitched a one-hit, five-inning shutout. She had two strikeouts, walked four and hit one batter.
California 5, Oregon State 1
At Berkeley, California
The Bears put away the win with a three-run sixth inning.
Stephanie Trzcinski limited the Beavers to five hits in a complete-game effort in the circle for Cal. She struck out four and did not issue a walk.
Oregon State fell to 27-25, 8-15 in the Pac-12. California is 30-21 and 6-16.
Jessica Garcia went 2 for 3 and scored the Beavers' only run. Oregon State's McKenna Arriola hit a double.
Annie Aldrete and Lindsay Rood had two hits apiece for the Bears.
The teams combined to commit six errors.
TRACK AND FIELD
Big Sky Championships
At Sacramento, Calif.
Portland State's Genna Settle qualified first in the women's 100 and second in the 200 on Friday in preliminary heats at the Big Sky Championships.
Akayla Anderson also qualified for the 100 finals and will be a contender for the 100 hurdles title.
The Viking women scored nine points in the women's long jump behind a fourth-place finish from junior Ta'mara Richey and a fifth-place finish from senior Brandi Williams.
Three Viking men advanced to finals on the track. Freshman Kamal-Craig Goluabe qualified for the 110 hurdles finals, senior Mitchell Grable in the 400 and Ben Richardson in the 800.