Washington 3, Oregon State 2
No. 1-ranked OSU failed to win for a 24th consecutive time, as the failure to take advantage of numerous scoring opportunities came back to haunt the Beavers.
The Beavers slipped 28-2, 12-1 in the Pac-12.
The Huskies, who will get a chance to win the series at 4 p.m. Friday and in the finale, 2 p.m. Saturday, climbed to 20-12, 7-3 in the conference.
The Beavers' Nick Madrigal doubled and tripled in his first two at-bats at Husky Ballpark, and scored on Trevor Larnach's double in the first inning.
But, after UW had tied the score in the sixth, Madrigal's two-out throwing error to first allowed two more Husky runs to score for a 3-1 home team advantage.
OSU got one run back in the ninth on singles by Madrigal and KJ Harrison, but left a runner on first — the Beavers' 12th man stranded.
Luke Heimlich (5-1) suffered the defeat, after going 6 1/3 innings. He allowed seven hits, two walks and one earned run, with seven strikeouts.
Oregon 8, Arizona 4
At Tucson, Arizona
The Ducks bumped off No. 7 Arizona in their series opener, improving to 23-8, 6-4 Pac-12 and handing the Wildcats their first home loss.
The Wildcats, opening a seven-game homestand, dropped to 24-9, 7-6 in the Pac-12 and 17-1 at home.
Games 2 and 3 in the series are 7 p.m. Friday and noon Saturday.
Oregon, which made it into one poll this week (No. 22 by Baseball America) took a 3-0 lead in the second. Tim Susnara singled home a run, and Morgan McCullough drove in two runs with a triple.
UO ace left-hander David Peterson (7-1) came out after a six-inning start and with a 3-2 lead. He allowed five hits, one walk and two runs, both unearned, and fanned five.
Each team scored a run in the seventh, which left the Ducks in front 4-3.
Oregon added two runs in the eight on a bases-loaded walk to Kyle Kasser and a sacrifice fly by Jake Bennett.
Arizona got a run in the bottom of the eighth to trail 6-4.
The Ducks came back with a two-run double by A.J. Balta.
Kenyon Yovan, the UO freshman from Westview, pitched the final 1 2/3 innings, striking out three and allowing one hit, to notch his 12th save.
San Francisco 4, Portland 0
At San Francisco
USF won the series opener, getting eight hits to the Pilots' six.
Mike Hicks was 2 for 4 for UP.
Tate Budnick (1-7) gave up six hits, one walk and three runs in six innings, striking out four.
Portland is 7-26-1, 3-10 West Coast Conference.
The Dons raised their record to 17-17, 4-9 WCC.
Washington 4, Oregon 2
At Jane Sanders Stadium
The perfect season was lost last week at UCLA. Now the two-loss season is gone, as well.
The fourth-ranked Ducks lost for the third time in 39 outings in 2017, dropping their series opener to the No. 12 Huskies.
The defeat hurts Oregon's chances of repeating as Pac-12 champion for the fifth consecutive year, with Arizona — ranked No. 1 in one poll — 41-1 overall and 13-0 in the league after winning 5-1 Thursday night at Utah (26-8, 8-3).
The Ducks scored their runs in the bottom of the fourth inning to lead 2-1, but couldn't muster more than one base runner in any of the final three innings.
Maggie Balint (16-2) took the loss, backed by only four hits, none for extra bases.
Washington improved to 30-9, 7-6 in the Pac-12.
The series continues with games at 7 p.m. Friday and noon Saturday.
Oregon State 8, UCLA 0 (5 innings)
At OSU Softball Complex
The Beavers scored four times in the third and fourth innings to run-rule the visiting and No. 8-ranked Bruins.
Natalie Hampton's hree-run home run capped the scoring in the third inning. Alysha Everett opened the scoring in the fourth with a three-run double.
Taylor Cotton (8-4) held UCLA to two hits, with no walks and four strikeouts.
OSU improved to 20-17 overall and 3-7 in the Pac-12, while the Bruins fell to 28-11, 4-6.
Concordia 3, Western Oregon 1
Western Oregon 6, Concordia 4
At Porter Park
Mattie Boucher (7-12) got the win in the series opener, scattering eight hits and one walk.
The Wolves got even in the nightcap to improve to 17-16 overall and 4-8 in the Great Northwest Athletic Conference.
The Cavaliers are 14-23, 6-12 GNAC going into Friday's 2 p.m. doubleheader with WOU.
Oregon State took the lead after the first day of two at the El Macero Invitational in Davis, California.
The Beavers finished at 23-over-par 599 through 36 holes. That was two better than second-place UC Davis in the 14-team event.
Ben Corfee of UC Davis and Alex Lee of Fresno State were leading individually at 1-over 145.
OSU's Jonas Liebich shot 77-71 to gain a tie for sixth. Kevin Murphy of the Beavers went 77-73 and was tied for eighth. OSU's Trevor Yu fired rounds of 70 and 81 and had a piece of 10th at the par-72
El Macero Country Club.
The final round is Friday.
Oregon 3, Sacramento State 2
At Sacramento, California
The Ducks' first of five matches in three days ended with their second victory in five tries this spring. Both wins have come over the Hornets by a 3-2 score.
Thursday's meeting came down to a battle of No. 1 teams, and Lindsey Vander Weide and Brooke Van Sickle rallied to win 14-21, 21-15, 15-11.
Oregon will play Stanford and Boise State on Friday at Stanford, and then take on Washington and California on Saturday, also on the Cardinals' sand.