No. 8 Texas defeated No. 13 Missouri 71-58 on Sunday afternoon thanks to strong defense.

The Longhorns dominated the glass and held the Tigers to 33.9% shooting to remain undefeated in the Big 12.

Jordan Hamilton had 16 points and a career-high 13 rebounds.

Texas has won six in a row overall.

Missouri recruit Tony Mitchell has been ruled ineligible by the NCAA, and the school plans no further appeals.

The 6-foot-8 forward from Pinkston High School in Dallas was considered one of the top high school prospects in the nation.

The Tigers had been hopeful Mitchell could join the program for the spring semester.

The NCAA said Wednesday that Mitchell did not qualify academically.

Missouri’s prized recruit, Tony Mitchell, has yet to be certified by the NCAA’s Eligibility Center.

The deadline to enroll in classes is Tuesday, which has heightened speculation about Mitchell's status.

When asked about Mitchell during the Big 12 men's basketball coaches' teleconference, coach Mike Anderson continued his months-long pattern of expressing optimism while withholding further comment.

“No update at this time, no,” he said. “We’re just still hoping.”

While Ohio State maintained the top slot in RealGM's college basketball rankings for the week of January 24th, Pittsburgh moved up to the second slot with their win over the previously undefeated Syracuse.

1. Ohio State
2. Pitt
3. Duke
4. San Diego State
5. Connecticut
6. Texas
7. Kansas
8. Brigham Young
9. Missouri
10. Villanova
11. Texas A&M
12. Syracuse
13. Purdue
14. Washington
15. Wisconsin
16. Notre Dame
17. Kentucky
18. Minnesota
19. Louisville
20. Georgetown
21. Illinois
22. Vanderbilt
23. Florida
24. Utah State
25. Michigan State

• Click here to view college rankings from the AP, Coaches and RealGM.

No. 14 Missouri defeated No. 24 Kansas State 75-59 thanks to 24 forced turnovers.

Phil Pressey was 3 for 5 from three-point range and had 13 points for the Tigers.

"He was like a little gnat out there, even to the point where one guy pushed over," coach Mike Anderson said of the freshman. "For a guy that's been out for almost three weeks to play the way he's played the last two games, he's got a chance to be a special player."

Jacob Pullen had 16 points and Jordan Henriquez-Roberts added 14 for Kansas State, which has dropped three of four.

Khris Middleton scored 11 points in overtime as Texas A&M beat Missouri 91-89 on Saturday afternoon.

The win was the 13th straight for the Aggies.

"Before overtime I told him: 'Just take over the game,' " coach Mark Turgeon said of Middleton. "He took over."

Middleton was 4 for 5 in overtime and his only miss was his first shot, an errant layup.

Alec Burks, Colorado's sophomore guard, scored a career-high 36 points in an upset win over Missouri by a final of 89-76.

The win against the No. 9 Tigers was Colorado's first win over a top-10 team in eight years. The Buffaloes had lost 19 consecutive games against top-10 teams, with their most recent win coming in February of 2003 against Texas.

Colorado frustrated Missouri by using a full-court press.

Burks entered the game as the Big 12's third-leading scorer.

Kadeem Green is expected to redshirt his freshman season at Missouri.

Green had played only 15 games of his senior season at United Faith Christian Academy in Charlotte, N.C., when he completely tore his Achilles' tendon in his left leg at a team practice in January of 2010.

He's still recovering from the injury.

“It’s a crazy feeling, knowing that you can go out there and help the team. But you can’t do anything about it, just sit there and watch,” Green said.

Six Big 12 men's basketball players have been named to the John R. Wooden Award Midseason Top 30.

Alec Burks (Colorado), Marcus Denmon (Missouri), LaceDarius Dunn (Baylor), Jordan Hamilton (Texas), Marcus Morris (Kansas) and Jacob Pullen (Kansas State) were selected among the top 30 candidates.

All players nationally who excel throughout the season will be evaluated and considered for the official voting ballot released in March.

Ben McLemore, who is considered the top remaining uncommitted prospect in the Class of 2011, still hopes to make a decision by the end of his winter break.

He will return to Mouth of Wilson (VA) Oak Hill Academy on Jan. 9.

McLemore recently made visits to Kansas and Missouri.