LUBBOCK, Texas — A greedy Texas defense is making Colt McCoy's life so much easier.

Curtis Brown and Earl Thomas each returned interceptions for touchdowns, and Cody Johnson had two short TD runs as the No. 3 Longhorns routed No. 13 Oklahoma State 41-14 Saturday to establish themselves as the clear frontrunner in the Big 12 South.

McCoy had an efficient 171-yard passing performance and threw his 100th career touchdown pass, and the Longhorns avoided the kind of letdown on Halloween weekend that cost them a chance to play for the Big 12 and BCS titles a year ago.

Texas came in with the nation's toughest defense against the run, then played havoc with Zac Robinson and the Oklahoma State passing attack. Robinson came in as the conference's top-rated passer after breaking the Cowboys' record for accuracy in a game a week earlier, but was intercepted a career-high four times against the Longhorns.

Texas scored 28 points off of Oklahoma State's five turnovers, with Brown and Thomas cashing in immediately and Johnson scoring on runs of 2 and 1 yards after two other takeaways.

That left McCoy, the runner-up for the Heisman Trophy, needing to do nothing spectacular in front of a Boone Pickens Stadium record crowd of 58,516.

He had a 44-yard pass to Malcolm Williams to set up Hunter Lawrence's 40-yard field goal on the opening drive of the second half. Two plays later, Thomas jumped in front of Hubert Anyiam to intercept Robinson's pass and race 31 yards untouched into the end zone for a 34-7 lead.