Carson McCusker's two-run double broke a sixth-inning tie and sent Oklahoma State to a 3-1 win over Connecticut in the NCAA Oklahoma City regional on Monday night.
The No. 9 national seed Cowboys (39-19) advance to the best-of-three super regionals this weekend at No. 8 Texas Tech. UConn (39-25) had won three straight elimination games before their season-ending loss.
Joe Lienhard (4-1) allowed one run on five hits and a walk in six innings. Peyton Battenfield pitched three innings of no-hit relief for his fifth save.
UConn's Anthony Prato singled in a run to open the scoring in the fifth, but the Cowboys evened it in the bottom half against Caleb Wurster. McCusker delivered his go-ahead double off CJ Dandeneau (4-2).
The Cowboys are in super regionals for the first time since 2016.