Four home runs in the first three innings gave Oregon State all the scoring it would need, while a great start from Dax Whitney shut down TCU.

Oregon State, now 43-13-1 and the top regional seed, will play USC in what amounts to the second game of a doubleheader Sunday night.

A runner-up finish in the Big 12 Conference baseball tournament had the TCU Horned Frogs on the bubble of hosting an NCAA Regional this postseason. TCU was ultimately tabbed as a No. 2 seed for the Corvallis Regional,

Oregon State advanced to face the loser of USC and Saint Mary’s, who are scheduled to play a winners’ bracket game Saturday night at Goss Stadium. The Beavers (42-13-1) will need to win a Sunday double-header and a Monday elimination matchup to move on to the super regionals.

Home runs by Diego Castellanos and Aide Taurek gave Saint Mary’s a 3-1 lead that they couldn’t hold onto against USC on Saturday night.

Oregon State fell behind early Friday night and could never catch underdog St. Mary’s. The No. 8 national seed Beavers got home runs from Gavin Turley and Trent Caraway but they weren’t enough as the Gaels claimed their first-ever NCAA baseball tournament victory with a 4-2 win in the NCAA Corvallis Regional at Goss Stadium.

The Oregon State Beavers won but the Oregon Ducks lost in the NCAA baseball regionals on Saturday, ending the Ducks season while the Beavers play again on Sunday.

The top-seeded Beavers suffered a stunning and staggering 6-4 defeat to the fourth-seeded Saint Mary’s Gaels in the opener of the Corvallis Regional, sending the decisive favorites into the loser’s bracket in their own backyard.

The Beavers played 20 true road games and 15 at neutral sites; twice this season, they left campus for 11 days.