STILLWATER, Oklahoma (Ticker) -- Oklahoma was blown out in its final non-conference tuneup. The start of Big 12 Conference play provided a similar result.

John Lucas scored 22 points and Tony Allen added 20 as Oklahoma State never trailed in cruising to an 77-56 rout of the 13th-ranked Sooners in a "Bedlam Series" contest.

Oklahoma (10-2, 0-1 Big 12) had its perfect start ruined Sunday with an 86-59 loss at Connecticut. If the Sooners found the trip to Gampel Pavilion difficult, they encountered even more trouble in their annual visit to Gallagher-Iba Arena.

"Going into this two-game stretch, at Connecticut and at Oklahoma State, we knew things would be tough," Oklahoma coach Kelvin Sampson said. "This is not a normal Oklahoma team and that is something that I am finding out. I can't have the same expectations for this team as I have for the last four or five."

Back-to-back baskets by Joey Graham gave Oklahoma State (11-2, 1-1) a 12-2 edge nearly four minutes into the game. Another 12-2 run that was capped by twin brother Stephen Graham's layup made it 31-13 with 6:47 to go before halftime.

The Sooners climbed within 35-26 at the break before the Cowboys came out of the locker room with another huge charge. Lucas' jumper capped a 14-3 surge for a 49-29 cushion with 13:13 to go.

"I have never experienced anything like this," said Lucas, playing his first "Bedlam Series" game. "Coach told us not to just win this one for ourselves, but also for all the players that came before us, Stillwater, the fans and the student body for supporting us the way they did."

Playing in front of a sellout crowd that included former Cowboys great Bryant Reeves, Oklahoma State did itself proud. Lucas controlled Sooners freshman point guard Drew Lavender and helped force 20 turnovers for Oklahoma.

"That was just a tremendous team effort and our defense was sensational," Oklahoma State coach Eddie Sutton said. "We really took them out of their offense."

Ivan McFarlin scored 17 points and grabbed nine boards as Oklahoma State held a 32-26 edge on the glass. The Cowboys shot 56 percent (31-of-55) and limited the Sooners to 35 percent (19-of-54).

"On my mind this whole week was Bedlam," McFarlin said. "I just wanted to come out and play hard. My teammates responded well."

The jittery Sooners, who feature mostly freshmen and sophomores, never were in the game. They failed to get the ball inside to Kevin Bookout, who managed only four points and five shots.