STILLWATER, OKLA. ? Joey Graham had a career game at just the right time for Oklahoma State.

Graham scored 30 of his career-high 36 points after halftime, and No. 7 Oklahoma State made seven of eight free throws in overtime to stave off Nebraska, 87-83, Saturday night.

Oklahoma State (21-2, 11-1 Big 12 Conference) won its 11th straight and remained in first place in the league.

“I told him and the team that I thought it was one of the best individual performances at Gallagher Iba (Arena) in a long time,” Cowboys’ coach Eddie Sutton said.

Graham made three of his four free throws, and Ivan McFarlin made four more in overtime. The Cowboys also were 7-of-9 from the line in the final 2:23 of regulation.

“I do not think I have ever had a hot streak like that,” said Graham, who was 12-for-19 from the floor and 9-of-11 from the line. “I was just feeling it tonight.”

Andrew Drevo led Nebraska (14-9, 4-8) with 21 points on 8-for-10 shooting, and Nate Johnson had 18.

Graham, whose previous high was 21 in a win over Texas on Jan. 24, hit two free throws with 1:28 left in overtime to put the Cowboys ahead for good at 84-83.

They came after Graham and Nebraska’s Marcus Neal traded three-pointers to tie it at 79.

Oklahoma State's Joey Graham, right, pressures Nebraska's Andrew Drevo. The Cowboys beat the Huskers, 87-83 in overtime, Saturday in Stillwater, Okla.

Johnson was fouled by Daniel Bobik on a reverse layup with six seconds left in regulation. He sank the free throw for the three-point play to tie it at 74. John Lucas missed a three-point attempt, and Tony Allen’s putback failed as time expired.

“I can’t even explain it because I didn’t even know it even went in,” Johnson said. “I just threw it up, and it happened to go in.”

That culminated a wild final minute of regulation that saw Lucas hit a three-pointer with 22 seconds left to put Oklahoma State up 73-68. Neal answered with a three with 16 seconds left to make it 73-71.

“We feel like we have been drug through a knothole,” Nebraska coach Barry Collier said.

Oklahoma State pulled ahead 52-44 for its largest lead on Graham’s three with 10:13 left, topping a 7-1 run. But the Cornhuskers came back to lead 57-56 on Brian Conklin’s layup that capped a 13-4 run with 6:29 remaining.

“I thought defensively we didn’t maintain dribble penetration as well as we should have, but they hit some tough shots,” Sutton said.