LOS ANGELES (AP) - Andre Roberson had 20 points and 11 rebounds – his third double-double this season against Utah – and Colorado pulled away in the second half to win 53-41 in the opening round of the Pac-12 tournament on Wednesday night.

Carlon Brown added 15 points and Spencer Dinwiddie 10 for the sixth-seeded Buffaloes (20-11), who notched consecutive 20-win seasons for the first time, having won a school-record 24 games last year in the Big 12. Coach Tad Boyle picked up his 100th career win.

Colorado advanced to a quarterfinal game Thursday against No. 3 seed Oregon at Staples Center. The Ducks (22-8) had a first-round bye.

Jason Washburn led the 11th-seeded Utes (6-25) with 11 points, their only player in double figures. They finished 0-13 away from home in their first season in the Pac-12, including 0-4 at neutral sites under first-year coach Larry Krystkowiak. He presided over the school’s first season of 20 or more losses.

Anthony Odunsi of the Utah Utes shoots against the Colorado Buffaloes during the first round of the Pac12 Men's Basketball Tournament at Staples Center on March 7, 2012 in Los Angeles. (Photo by Stephen Dunn/Getty Images)

By BETH HARRIS, AP Sports Writer

(© Copyright 2012 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)