BOULDER, Colo. -- No. 20 Colorado took down another top-10 foe and handed Oregon its first loss of the season.
Guard Askia Booker had 27 points as the Buffaloes defeated No. 10 Oregon 100-91 Sunday afternoon at the Coors Events Center. Guard Spencer Dinwiddie added 23 points for the Buffs.
Last month, Colorado defeated No. 7 Kansas at home.
Colorado (13-2) improved to 11-0 at home.
Oregon (13-1) was looking to match the best start in school history, but let a 10-point lead get away in the second half. Forward Mike Moser led Oregon with 24 points.
Dinwiddie hit back-to-back three-pointers to break a tie and give Colorado a 70-66 lead with 8:14 left in the game before adding a couple free throws.
Oregon got within 74-72 on a driving layup by forward Elgin Cook with 6:28 to play. Guard Xavier Talton made a jumper, Booker made a free throw, and Talton added two more free throws to stretch the lead to 79-72 with 5:03 left.
Forward Josh Scott added a free throw before Oregon guard Damyean Dotson made a three-pointer to get Oregon within 80-75 with 4:48 remaining in the game.
The Buffs scored on 10 straight possessions down the stretch to take a 91-80 lead on two free throws by Booker with 2:23 remaining in the game.
Oregon jumped ahead at the start of the game as Moser scored five straight Oregon points to put the Ducks ahead 8-4. Booker then scored four straight points and guard Jaron Hopkins followed with a lay-up to give the Buffs their first lead at 10-8.
Guard Johnathan Loyd tied the game with a layup for Oregon, and guard Joseph Young converted a three-point play and made a three-pointer.
Talton scored for Colorado, but guard Jason Calliste responded with a three-pointer to give the Ducks a 19-12 lead.
Dotson added a couple free throws to give Oregon its biggest lead of the half at 21-12 before Colorado made seven straight free throws. Dinwiddie made a layup to get the Buffs within 23-21 before forward Richard Amardi answered with a dunk for the Ducks.
Booker drained a three-pointer and forward Xavier Johnson made a layup to put Colorado back ahead 28-27. The two teams traded the lead until Booker scored to put Colorado up 32-31 and Scott followed with a basket for the Buffs.
Colorado stretched the lead to 42-35 on a three-point play by guard Tre'Shaun Fletcher before Oregon closed out the half on a 7-2 run ended with a three-pointer at the buzzer by Calliste to get the Ducks within 44-42 at the break.
NOTES: Oregon had been 14-0 only in 1926-27 and 1937-38, but lost its next game during each of those seasons. ... The Buffaloes are ranked in the AP poll for the fourth week in a row, marking their longest run in the rankings since 1997. ... Oregon junior forward Brian Crow, a walk-on transfer from Sonoma State, missed his seventh straight game with an ankle injury.