STILLWATER, Oklahoma (Ticker) -- Oklahoma entered Gallagher-Iba Arena without a win in its last four trips. Freshman JamesOn Curry extended that streak with his hot shooting.
Curry tied a season-high with 22 points and Joey Graham added 22 as No. 10 Oklahoma State extended its Big 12 Conference winning streak to five games with a 79-67 victory over 18th-ranked Oklahoma.
Oklahoma State, which had lost its last three games against ranked opponents, has won 27 straight home games, the longest streak in the nation.
"When you go on the road and play in this type of environment against a team like that, there are two things you better be good at; don't turn the ball over and make your free throws," Oklahoma coach Kelvin Sampson said. "If we would have done a better job in those two areas we would have had a chance to win the game."
The Sooners committed 15 turnovers and shot just 42 percent (5-of-12) from the free throw line as they lost for the third time in four games.
After the Cowboys (18-3, 8-2 Big 12) dropped a 67-57 decision at Norman on January 24 behind an uncharacteristic 35-percent shooting performance, Curry made sure Oklahoma State sizzled from the field in this one.
The 6-3 guard scored five of the Cowboys' first eight points and had 13 on 5-of-8 shooting in the first half as Oklahoma State built a slim, 35-33, advantage at the break.
Oklahoma was able to stay close by outrebounding Oklahoma State, 14-9, and getting 10 points from reserve guard Lawrence McKenzie.
In the second half, Curry ignited an 11-2 run with a follow shot and a layup within a 27-second span. John Lucas completed the spurt with a 3-pointer for a 48-39 lead with 15:39 remaining.
"JamesOn Curry just keeps getting better and better," Oklahoma State coach Eddie Sutton said. "He has got ice in his veins. For a freshman, he is really a nice player."
"I think he took my word two weeks ago when I told him to pretend he was playing back on the playground or back in high school. He has been shooting the ball like that in practice."
The Sooners closed within 60-56 with 7:15 remaining on a follow shot by Johnnie Gilbert, but Lucas answered with his third 3-pointer of the game. Stephen Graham dunked and Joey Graham added a jumper to make it 67-56 with 5:37 left.
After shooting 59 percent (13-of-22) in the first half, Oklahoma State cooled down to 49 percent (17-of-35) after intermission but did an outstanding job protecting the ball, committing just two of its 10 turnovers.
On the defensive end, the Cowboys forced the Sooners into six turnovers in the second half, scoring six points off the giveaways. They also topped the Sooners in rebounding with a 18-16 margin, including six offensive boards.
"I thought that in the second half we played about as well as we have played in a while," Sutton said. "I thought our defense was real active, but we still did not do a good job of keeping the ball out of the post. I thought we rebounded better in the second half. We forced some turnovers and were able to run with the ball."
"When we were in Norman, we didn't play physical against them," Oklahoma State forward Ivan McFarlin said. "We wanted to force the contact on them, come out and play hard. We wanted to force their guards to make plays."
Oklahoma point guard Drew Lavender, who had eight points and seven assists in the Sooners' win on January 24, scored just three on 1-of-4 shooting and had three assists against two turnovers.
Curry finished 9-of-13 from the field with three 3-pointers, Lucas scored 15 points and Ivan McFarlin chipped in 13 and 10 rebounds for Oklahoma State, which shot 53 percent (30-of-57) with eight 3-pointers.
The Cowboys entered the game shooting 51 percent from the floor this season, ranking first in the conference and fifth in the nation.
Kevin Bookout scored 15 points, Taj Gray had 14 and McKenzie added 13 for Oklahoma (17-5, 6-3), which fell to 13-19 against Oklahoma State since Sutton became the coach in 1990.