With about four minutes remaining in the first half Friday night, Oregon star Joseph Young had missed every time he shot the ball and managed just two points.
By halftime, he had made a mockery of Oklahoma State's stingy defense.
The Pac-12 player of the year scored 15 of his 27 points in a flurry, leading the eighth-seeded Ducks to a 79-73 win over the Cowboys in their West Regional game in Omaha, Neb.
Elgin Cook added 18 points, and Dillon Brooks had 17 for the Ducks (26-9), who got a win for Dana Altman in his return to Omaha, where he once coached Creighton.
Le'Bryan Nash had 18 points before fouling out in his final game for ninth-seeded Oklahoma State (18-14).
Wisconsin 86, Coastal Carolina 72 - Big Ten player of the year Frank Kaminsky had 27 points and 12 rebounds for his 12th double-double of the season, and the No. 1-seeded Badgers (32-2) defeated the Chanticleers in Omaha.
Sam Dekker scored 20 points against a Coastal Carolina team that gave a game effort but had no answer for the 7-foot Kaminsky.
Wisconsin, the Big Ten's regular-season and tournament champion, will play Oregon on Sunday.