Boulder, Colo. ? Oklahoma State freshman JamesOn Curry played a lot like a senior in his first start for the Cowboys on Sunday.

Curry scored 17 of his career-high 22 points in the second half and was 6-of-8 from three-point range — including making all five in the second half — in No. 9 Oklahoma State’s 104-86 victory over Colorado.

Curry, who started in place of Daniel Bobik, helped shut down Colorado freshman Richard Roby, who burned the Cowboys (15-3, 5-2 Big 12 Conference) with four three-pointers and 12 points in the first half.

Coach Eddie Sutton put Curry on Roby exclusively in the second half, and Curry held Colorado’s leading scorer to just two more points.

“The guy played a terrific game,” said Curry’s backcourt partner, John Lucas, who added he thought the pair were the best guard combination in the Big 12.

Curry was more reserved about his performance.

“I had six steals and no turnovers, that’s all that matters,” he said.

Lucas scored 26 points for Oklahoma State, which won in Boulder for the first time since Feb. 24, 1996. The Cowboys scored their most points since scoring 108 against Oklahoma in 1989, when they played in the Big Eight.

“I thought it was the best offensive performance we’ve had in a long time,” Sutton said. “When your starting guards have 48 points, 12 assists and only one turnover, you’re not going to lose very many games.”

Colorado forward Andy Osborn, left, pulls down a rebound in front of Oklahoma State forwards Terrence Crawford, center, and Joey Graham. OSU beat the Buffaloes, 104-86, on Sunday in Boulder, Colo.

Andy Osborn and Chris Copeland each scored 19 points to lead the Buffaloes, who were outrebounded 36-23.

The Cowboys were 13-of-21 on threes, while Colorado was a school-record 17-of-29. The 30 three-pointers was the most by two teams ever at Colorado’s Coors Events Center.

Oklahoma State rebounded from a 67-57 defeat to No. 13 Oklahoma on Monday, when Lucas and Bobik combined to shoot 4-for-16 and Curry scored just four points.

“Last Monday, on national television, was a wake-up call,” Lucas said. “Today, we got our swagger back, and it was time we got our swagger back.”