During one haphazard stretch, Texas turned the ball over five times in six possessions, and the one time it got a shot off, McClellan tossed up an air ball.
The Wildcats took advantage by putting together an 8-0 run. By the time Texas coach Rick Barnes called for a timeout, the Wildcats had pulled ahead 21-9 with 8½ minutes left in the half.
Texas finally ended its drought when McClellan scored in transition, and in the process ran over Spradling. Trainers rushed out and pushed a towel against his bloody face, and after a few seconds on the bench, Spradling was accompanied to the Kansas State locker room.
Now without three key contributors, Kansas State continued to build on its lead.
Lawrence, who averaged just 2.4 points, matched his career high with 10 in the first half. Shane Southwell had his five first-half points during a stretch that included an intentional foul on the Longhorns' Javan Felix that helped Kansas State take a 31-13 lead.
"It started with our defense. We turned them over," Weber said. "We got so many steals, turnovers, deflections. Omari ran the court, Angel pushed it. We got some inside looks, moved the basketball. That was the best part of it. That's why we were able to survive."
Texas had twice as many turnovers (12) as made field goals at the half, going 6 of 23 from the field and missing both of its 3-point attempts. And its 19 points barely eclipsed the season-low for a half — they managed 17 in the first half of a loss to Georgetown in December.
Felix finally got things going for Texas early in the second half, going straight to the rim for easy layups on three straight possessions. But McGruder, back on the court, made a three-point play with 17½ left to put a stopper in the Longhorns' momentum.
Gipson scored three straight baskets to answer another Texas salvo, and a pull-up 3-pointer by Spradling in transition pushed the Wildcats' lead to 53-33 with less than 13 minutes to go.
Kansas State used a 14-2 run a few minutes later to put the game away.
"This was a pretty easy one to figure out," Barnes said. "If you weren't ready to play right from the beginning, the rebounding, the mood — this is what you get. We definitely deserve what we got, because we didn't do anything right in a lot of ways."