Oregon State 3, USC 1
At Goss Stadium
Luke Heimlich's eight strong innings led the No. 1-ranked Beavers to a win in their season opener in Corvallis.
Heimlich (6-1) allowed one hit and one walk, while striking out seven, as Oregon State improved to 33-3 overall and 17-2 in the Pac-12.
OSU also is 14-0 at home.
The Trojans dropped to 18-21, 5-11.
Jake Mulholland came out of the bullpen first, followed by Drew Rasmussen, making his return from injury. The junior who had Tommy John surgery after an elbow injury midway through the 2016 season, got the save with a fly out and ground ball to first baseman KJ Harrison.
USC took a 1-0 lead in the second inning. The Trojans got a leadoff walk and single before pushing across a run with a ground out and sacrifice bunt.
OSU scored twice in the bottom of the second, bunching three of its nine hits with a walk — after with two out. And then a throwing error by the USC pitcher resulted in both runs.
Other games in the series are 1:30 p.m. Saturday and 1 p.m. Sunday.
Oregon 2, Arizona State 0
At PK Park
Oregon was looking to snap a five-game skid, and ace David Peterson was up to the task.
He allowed four hits and one walk in nine innings, with 20 strikeouts — a school record — and the Ducks climbed to 24-13, 7-9 Pac-12.
The Sun Devils, who were 0 for 4 with runners in scoring position, fell to 18-21, 5-11.
Peterson (9-2), a 6-6 junior left-hander from Denver, broke his own mark for Ks by three in the longest start of his career.
Oregon, which had four hits in the game, scored its runs in the fourth. Spencer Steer led off with a walk, and Gabe Matthews moved him to third with a single. Matthew Dyer's bunt single scored Steer. With two out, Matthews scored from third on a on a failed pickoff attempt and error by the ASU third baseman.
The Sun Devils got a leadoff double in the ninth, but couldn't advance the runner.
The teams will meet at 2 p.m. Saturday and noon Sunday.
Portland 10, Pacific 7
At Stockton, California
The Pilots pulled ahead 9-5 with four runs in the top of the fifth, and went on to post their first win since April 15.
The host Tigers out-hit UP 16-10, but Portland got two RBIs from Beau Brundage and Mike Hicks and used four UOP errors to take control, as only four Portland runs were earned.
UP improved to 9-32-1 overall and 5-14 in the West Coast Conference.
The Tigers dropped to 13-26, 2-17 WCC.
Other games in the series are 6 p.m. Saturday and 1 p.m. Sunday.
Montana State Billings 6, Concordia 3 (11 innings)
Montana State Billings 3, Concordia 2
At Porter Park
In the opener, neither team scored from the sixth through 10th innings, before the Yellowjackets produced three runs on a leadoff walk, three hits and two Concordia errors.
Mitch Bevacqua of the host Cavaliers hit a two-run home run in the first to lead off the scoring in Game 1.
In the nightcap, MSU Billings erased a 2-0 deficit with one run in the fourth and two in the sixth (on a two-run HR by clean-up batter Ryan Myers).
The results left the Cavs at 12-34 for the season and 10-26 in the Great Northwest Athletic Conference.
MSU Billings improved to 20-26, 18-18 and took the two-day series, 3-1.
Oregon 8, Oregon State 0 (5 innings)
At Jane Sanders Stadium
Freshman Mia Camuso's grand slam, her second home run of the season, ended the opener of the Civil War series by run rule in Eugene.
The sixth-ranked Ducks raised their record to 39-6 overall and 12-6 in the Pac-12.
OSU slipped to 24-20, 6-10.
The series continues with games at 1 p.m. Saturday and 3 p.m. Sunday.
It took Oregon 2 2/3 innings to get a hit, and then the Ducks got caught trying to steal second immediately after an infield single.
A solo homer in the fourth by Gwen Svekis put Oregon on top 1-0 against Taylor Cotton (10-6), who went the distance.
Later in the inning, Shannon Rhodes' bunt single scored a second run from third base.
Then, with two out, Madi Bishop drove in two more runs with a double.
The fifth inning contained more Oregon offense, which set the stage for Camuso's blast over the fence in center field.
Megan Kleist (15-3) allowed three hits and no walks, with five strikeouts.
Portland State 5, North Dakota 0 (10 innings)
North Dakota 6, Portland State 4
At Grand Forks, North Dakota
The visiting Vikings exploded for five runs in the 10th inning to win the first game of a Big Sky doubleheader. Katherine Kramer and Shae Nelson each drove home a run with a single, and then Celena Carrisosa doubled in three runs.
Alyssa Burk won on a three-hitter with six strikeouts and five walks.
But in the second game, UND overcame a 4-0 deficit, scoring once in the fourth and five times in the fifth, as Burk fell to 4-13, giving up seven hits and one earned run in six innings. PSU's four-run second included five of the Vikings' eight hits.
PSU is 8-32 overall and 6-11 in conference play.
North Dakota is 20-29, 6-10.
Oregon leads the Pac-12 championships after a wild day of weather and nearly two rounds at Boulder Country Club in Colorado.
Wind, cold, rain and even snow fell on the golfers as they competed on the par-70, 7,129-yard course. Play was suspended due to darkness and with all but four groups through 36 holes.
The seventh-ranked Ducks, who won the NCAA championship a year ago, was 16-over-par and still on the course, as was second-place and 31st-ranked Washington, which was 19-over.
In the clubhouse at 26-over for third place was No. 4 Stanford.
Oregon State was 11th out of the 12 teams, finishing in 52-over.
Oregon's Wyndham Clark and Washington's Carl Yuan shared first individually, both 2-under through 34 holes, two ahead of Rico Hoey (72-68—140).
TRACK AND FIELD
Oregon won three events at the Penn Relays in Philadelphia.
The women's 4x100 relay broke the meet record, clocking 42.35 seconds with Alaysha Johnson, Deajah Stevens, Makenzie Dunmore and Ariana Washington.
The UO men (Blake Haney, Marcus Chambers, Mick Stanovsek and Sam Prakel) took the distance medley relay in 9:32.61.
And then Dunmore, Stevens, Hannah Waller and Raevyn Rogers ran an all-time NCAA best 3:39.05 to capture the sprint-medley relay — with Texas A&M bettering their mark with its 3:39.04 a few minutes later.
San Diego 4, Portland 2
At Claremont, California
West Coast Conference regular-season champ UP took the doubles point, but San Diego rallied to tie the match at 1-1 and 2-2 and went on to the win.
The 46th-ranked Pilots still have hopes of being an at-large pick to the 64-team NCAA tournament. The field will be announced at 2 p.m. Tuesday.
Pepperdine will meet San Diego (16-10) in the WCC tourney finals on Saturday.
Stanford 4, Oregon 0
At Ojai, California
The fifth-seeded and 40th-ranked Ducks had their conference championships run end at the hands of the No. 1-seeded and sixth-ranked Cardinal.
Stanford, ranked sixth in the nation, improved to 19-2 overall, after going 10-0 in Pac-12 regular-season action.
Oregon (14-10, 6-4) will find out Tuesday afternoon if it has made the NCAA tournament.
ACROBATICS AND TUMBLING
Oregon 277.625, Azusa Pacific 271.335
At Azusa, California
The Ducks and Baylor Bears will meet again for the National Collegiate Acrobatics and Tumbling Association championship on Saturday.
Baylor has defeated Oregon the past two years in the finals.
The Bears topped Quinnipiac on Friday, 279.325-273.945.
Oregon and Baylor split in two regular-season meetings this year.
Both Oregon teams lost in the pairs bracket at the Pac-12 championships in Tucson, Arizona.
Lindsey Vander Weide and Brooke Van Sickle fell to a duo from Arizona State, 21-13, 21-19, and Taylor Agost and August Raskie lost to a team from Cal, 21-14, 21-5.