Having one sure would have helped in the first half.
That's when the Cowboys took control with a 19-3 run, taking advantage of the Jayhawks' lousy offense while getting the ball in the hands of Brown, who had 11 points during the surge.
"We had to come out, punch them in the mouth and not let the crowd get into it," Brown said.
By the time Brown was fouled by Johnson and converted the three-point play with 10:58 left in the half, Oklahoma State had a 26-12 lead — the largest by anybody on the Jayhawks all season.
Kansas eventually went on an 11-3 run of its own to get back into the game, but Brown delivered another 3-pointer out of a timeout and Oklahoma State managed to maintain a 40-34 lead at the break.
Brown finished the first half with 22 points, just two off his season high. The junior guard was 7 of 10 from the field, 5 of 7 from the arc and even had a couple assists.
Brown hit another 3 out of halftime before Kansas finally started to execute.
McLemore led the way with 11 points during a 16-4, momentum-changing run. Twice he finished off alley-oops from Johnson, and his lay-in with 13:23 left gave Kansas a 50-47 lead.
Smart and Brown refused to let the Cowboys wilt, though.
Smart, who considered Kansas before signing with the Cowboys, scored back-to-back baskets, and Forte finally scored after missing his first eight field-goal attempts. Brown then hit his seventh 3-pointer, pulling Oklahoma State within 59-58 with just over 8 minutes left in the game.
Forte added his first 3 moments later, and Michael Cobbins followed up a miss by Forte with a massive dunk that allowed the Cowboys to regain a 67-66 lead with 3:45 remaining.
"They got the best of us, definitely, on offensive rebounds," Withey said.
Le'Bryan Nash, who had struggled all game, beat the shot clock with a jumper with 2:40 left that gave Oklahoma State a 69-68 lead. And despite some tense moments down the stretch, they did enough on defense and at the foul line to hang on for a signature victory.
"It's a big win, winning at Kansas. That's one of the biggest wins of our season right now," Nash said. "It was a good win, but we still want more."