Christian Koloko scored 24 points, Bennedict Mathurin added 20 and No. 2 Arizona held off Stanford 84-80 in the Pac-12 quarterfinals.
Arizona's Bennedict Mathurin has been named The Associated Press Pac-12 player of the year after a dominating sophomore season.
Harrison Ingram and Spencer Jones scored 21 points apiece and Stanford beat No. 5 Southern California 75-69 for its first win over a top five team in nearly 15 years.
Andrew Jones scored 13 points and No. 17 Texas beat Stanford 60-53 on Sunday in the Pac 12 Coast-to-Coast Challenge.
LJ Cryer scored 21 points, and No. 9 Baylor took control early in the second half of an 86-48 victory over Stanford.