Xavier Talton scored five of his 14 points in overtime, including the go-ahead 3-pointer to start the extra period, and Colorado overcame a 12-point second-half deficit to beat Utah 79-75 on Saturday.
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.
Southern Cal missed a slew of shots in the early going and No. 21 Colorado never gave the Trojans a chance to recover.
Norman Powell matched his season high with 19 points and No. 25 UCLA pulled away in the second half to beat No. 21 Colorado 69-56 Thursday night, handing the short-handed Buffaloes their first home loss of the season.
Josh Scott scored eight of his 19 points in overtime as No. 15 Colorado held off Washington State 71-70 on Wednesday night.
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.
Josh Scott, Askia Booker and Jaron Hopkins all scored 13 points, and No. 20 Colorado hung on to beat Oregon State 64-58 on Thursday night in the Pac-12 opener for both teams.
Markel Brown scored 23 points and had 11 rebounds to lead No. 7 Oklahoma State over CU, snapping the Buffaloes’ 10-game winning streak.
Josh Scott scored 16 points, Askia Booker had 13, and Colorado routed Air Force 81-57 Saturday for its seventh win in a row.
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.