LOS ANGELES -- Jared Cunningham hit a go-ahead layup with 31.8 seconds left, and ninth-seeded Oregon State, which blew a 15-point lead in the second half, rallied for a thrilling 86-84 victory over top-seeded Washington on Thursday in the Pac-12 tournament quarterfinals.

Cunningham scored 18 points and hit two free throws with 6.2 seconds to play despite missing four additional free throws in the final 17.5 seconds.

Devon Collier had 19 points and seven rebounds for the Beavers (19-13), who survived a crazy matchup with the league champion Huskies when Tony Wroten, Washington's freshman star, couldn't hit four late free throws of his own.

PHOTO GALLERY:Beavers vs Huskies in semis

Wroten had a career-high 29 points in the highest-scoring performance by a Washington freshman, but the Pac-12's top rookie clanked two free throws with 18.3 seconds left and two more with 8.7 seconds to play.

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