Nick Johnson scored 18 points, Brandon Ashley added 15 and top-ranked Arizona remained unbeaten with a 69-57 win over Colorado on Thursday night.
No. 21 Colorado has lost leading scorer Spencer Dinwiddie for the rest of the season with a knee injury.
Guard Spencer Dinwiddie was hurt and Washington ran away from No. 15 Colorado for a 71-54 victory Sunday.
Askia Booker scored a career-high 27 points, 11 in the last 4:40, and No. 20 Colorado rallied in the second half to hand No. 10 Oregon its first loss of the season, 100-91 on Sunday.
The Buffaloes made all 26 of their free throws, the most in a game without a miss in school history, and CU finished strong to beat Georgia 84-70 on Saturday night.
Markel Brown scored 23 points and had 11 rebounds to lead No. 7 Oklahoma State over CU, snapping the Buffaloes’ 10-game winning streak.
Spencer Dinwiddie scored 19 of his game-high 28 points in the second half leading CU to a 67-62 victory over in-state rival CSU Tuesday night.
Spencer Dinwiddie scored 10 of his 17 points in the second half, helping Colorado rally from 14 points down to beat previously undefeated Harvard 70-62 on Sunday.
Spencer Dinwiddie scored 24 points and Askia Booker added 14, helping Colorado hold off UC Santa Barbara 76-68 on Thursday night for its fifth straight victory.
Josh Scott scored 20 points and Spencer Dinwiddie added 13, helping Colorado pull away late from Arkansas State for a 93-70 win on Monday night.