BOULDER, Colo. — Walking into the CU Events Center on Saturday, fans were handed a poster of Colorado's Tyler Bey. They were treated to a show from the sophomore on his night.

Bey had a career-high 27 points on 9-of-9 shooting, leading Colorado (12-9, 3-6 Pac-12) to a 73-51 win over Oregon.

Bey chipped in 10 rebounds for his sixth double-double of the season and scored 13 points in the game's first nine minutes.

"He was dialed in tonight," Colorado coach Tad Boyle said. "I love Tyler Bey. I always have and always will. I was really proud of how he responded to a very disappointing performance on Thursday, not that he was the reason we lost but when he elevates his game, so do we."

Bey's quick start was followed by the rest of the Buffaloes, who began the game on a 24-5 run and took a 40-17 lead into the break. It was the most points allowed, and the second-fewest points scored, by the Ducks in a first half this season.

Oregon has never won in eight trips to Boulder and is 0-6 at Colorado since the Buffaloes joined the Pac-12 Conference.

"You're always disappointed when you don't play well and I don't want to take anything away from Colorado," Oregon's coach Dana Altman said. "We got beat in every facet. They shot free throws ... we got beat by 13 at the free-throw line. You get beat on the boards, you get beat on the free-throw line, you don't guard very well and you take bad shots, you're going to get kicked."

Louis King had 12 points and Payton Pritchard added 10 for Oregon (13-9, 4-5), which struggled with foul trouble all game.

"Poor execution on the offensive end," Altman said. "We didn't run anything. Our guys are really just stuck in the mud. Defensively a poor effort and we got beat on the boards. We got beat in every facet of the game."

Oregon shot 31 percent for the game, a low for the Ducks in Dana Altman's nine years in Eugene. The last time Oregon shot worse than Saturday was Feb. 6, 2010 in a 62-42 loss to rival Oregon State.

In the middle of Colorado's big first-half scoring spurt, Bey had a massive put-back dunk. Coming from the weak side block nearly eight minutes into the game, the forward threw it down hard over Oregon's Miles Norris.

"I've been watching that since I was in high school," Colorado's Lucas Siewert said of Bey. "To see him come to play like that is pretty fun."

Siewert scored 10 points and added six rebounds.