McKinley Wright IV scored 18 points and Colorado held off California 56-51 on Wednesday in the opening round of the Pac-12 tournament.
The fifth-seeded Buffaloes (20-11) had a hard time holding onto the ball, committing a season-high 23 turnovers, but made up for it by shutting down the Bears defensively.
Colorado used an eight-point burst midway through the second half to go up 10 and held off a late Cal charge to remain undefeated (8-0) in Pac-12 Tournament first-round games
The Buffaloes move on to face No. 4 seed Oregon State in Thursday's quarterfinals.
Oregon 84, Washington State 51:
Ehab Amin scored 17 points, Miles Norris added 14 and Oregon rolled over Washington State 84-51 Wednesday night in the most lopsided game in Pac-12 tournament history.
The sixth-seeded Ducks (20-12) jumped on the Cougars from the start, racing out to a 15-point lead in the opening 12 minutes. Oregon shot 49 percent from the floor and had 14 steals to earn a spot in Thursday's quarterfinals against No. 3 seed Utah.
The tournament's largest margin of victory had been 32, accomplished twice.
Washington State (11-21) shot 31 percent, went 7 for 32 from the 3-point line and didn't hit double-digits in points until the 5:34 mark of the first half
The 11th-seeded Cougars also had 20 turnovers that led to 26 Oregon points in their ninth straight one-and-done trip to the Pac-12 tournament.
Washington State had no players score in double figures.