The divided crowd at PK Park had reason to cheer in unison after a sixth inning that lasted more than 45 minutes.
Oregon State fans could cheer about eight runs, nine hits and a barrage of hard-hit balls against the Oregon bullpen.
Duck fans could cheer because the carnage was finally over.
The huge sixth inning propelled the Beavers (36-7) to their second straight season sweep of Oregon with a 10-0 nonconference victory Tuesday night. Oregon State has won nine consecutive games in the series, with Tuesday’s being the most lopsided of the bunch.
"That's what good teams do, and they're a good team," Oregon coach George Horton said. "When a good team gets it rolling and you give them extra opportunities, it ends up being a crooked number."
While the Ducks managed only three hits, Oregon State pounded 19 against seven Oregon pitchers. Most of the damage came against a trio of relievers in a sixth inning that saw 13 batters come to the plate
After Adley Rutschman opened the inning with a groundout, Michael Gretler and Tyler Malone smacked back-to-back doubles against Nico Tellache. The Ducks then inserted righthander James Acuna, who failed to retire any of the six batters he faced.
After three consecutive singles, a bases-loaded double from Cadyn Grenier gave the Beavers a 5-0 lead. Trevor Larnach drove in two more runs with a single before Hunter Breault entered the game for Oregon and allowed a two-run single to Rutschman.
"They're not real confident right now," Horton said of his relievers. "They're young guys that don't have command of all their stuff. There's no question they're in a mental funk right now."
The bullpen implosion overshadowed a solid performance from freshman Cullen Kafka, who made his fourth start and allowed four hits and one run in 4 2/3 innings. He struck out five and held the Beavers scoreless until the fifth, when Nick Madrigal drove in Steven Kwan with a bloop double that escaped the diving reach of Jakob Goldfarb in right.
Gretler finished 2-for-6 with a solo home run off Brett Walker in the eighth. Grenier was 2-for-5 and extended his hitting streak to 20 games.
"We didn't do a whole lot early," Oregon State coach Pat Casey said. "I thought we left some runs on the board. We made some mistakes on the bases, but overall, anytime you can come in and win a midweek game and not give up any runs is pretty good."
Christian Chamberlain, Brandon Eisert and Nathan Burns combined on the shutout for Oregon State, with Chamberlain making the start and throwing 4 2/3 innings.The only hit he allowed was a soft single to Gabe Matthews that barely escaped the infield.
"We didn't decide until this morning at 10 o'clock who we were going to start, and it turned out to be a good decision," Casey said.
The Ducks put runners at second and third with one out in the eighth, but the inning ended after Kyle Kasser popped out to left and Daniel Patzlaff was caught in a rundown at home plate.
The Ducks (22-24) have lost 13 of their last 17 games and suffered their fifth shutout of the season. The Beavers, who trail Stanford by 2 1/2 games in the conference standings, have won 12 of 14 leading into a weekend showdown against the No. 2-ranked Cardinal in Corvallis.