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NORMAN, Okla. -- Another strong showing by Oklahoma's defense has it another step closer to a conference title.
Chris Brown became the first back in four seasons to gain 100 yards against the Sooners, but they turned back three fourth-quarter drives in a 27-11 victory over Colorado on Saturday.
Brown, the nation's leading rusher at 162.9 yards per game coming in, needed 25 carries to gain 103 yards on a cold, sometimes rainy day.
"He's a great player. He deserves his reputation," Oklahoma coach Bob Stoops said. "We were fortunate to make our plays. To keep them to 11 points is pretty special."
It was Oklahoma's third consecutive victory against a ranked team, including then-No.3 Texas and then-No.9 Iowa State.
The Buffaloes cut a 27-3 deficit to 27-11 late in the third on a 12-yard run by Bobby Purify and a two-point conversion. They came up empty in the fourth after driving to the Oklahoma 23, 8 and 10. They missed a field goal the first time and turned the ball over on downs twice.
TEXAS 27, NEBRASKA 24: Chris Simms passed for a career-high 419 yards, and Nathan Vasher intercepted Jammal Lord's pass at the 1 in the closing seconds for the visiting Longhorns.
Texas appeared in position to run out the clock when Roy Williams was called for offensive pass interference, setting up a third and 22 from Nebraska's 27.
Simms lost 3 yards, and DeJuan Groce returned the punt 44 yards to the Texas 16 with less than a minute left. Three plays later, Lord tried to hit Wilson Thomas, on the right side, but his pass was picked off.
IOWA ST. 42, MISSOURI 35: Seneca Wallace set school records with 31 completions and 493 total yards and Mike Wagner scored on a 1-yard run with 32 seconds left for the host Cyclones.
Missouri tied it at 35 when Marcus James returned a punt 80 yards for a touchdown with 10:26 left, its first punt return for a touchdown since 1990.
But Wallace directed a 13-play, 93-yard drive for the winning touchdown. Wallace was 4-for-4 for 29 yards on the drive and ran four times for 59 yards, including 33 and 11 yards, that took the ball to the Missouri 4.
Wallace finished 31-of-47 for 425 yards and a touchdown and carried 10 times for 68 yards and another touchdown.
KANSAS ST. 64, KANSAS 0: Ell Roberson ran for three touchdowns and threw for another in the first half for the visiting Wildcats.
Darren Sproles added 110 rushing yards and two touchdowns for Kansas State, which had five scoring drives of one minute or less.
Roberson had two 4-yard touchdown runs and threw a 19-yard touchdown to James Terry as Kansas State led 30-0 at the end of the first quarter.
OKLAHOMA ST. 28, TEXAS A&M 23: Tatum Bell rushed for 143 yards and three touchdowns, and Vernon Grant intercepted a pass in the end zone with a minute left for the host Cowboys.
Oklahoma State led 28-14 at halftime. The Aggies pulled within five on Bethel Johnson's 23-yard touchdown catch in the third.
They drove to the Cowboys 31 with less than two minutes left, converting two fourth downs before Grant's interception.
TEXAS TECH 62, BAYLOR 11: Kliff Kingsbury threw for 373 yards and three touchdowns for the host Red Raiders, who gained 654 yards.
After struggling on its first two possessions, Texas Tech scored on its next four to take a 28-3 halftime lead.