Oklahoma Sooners

Aaron Colvin is the definition of a defensive stopper.

The Oklahoma cornerback is in just his second season playing the position but already looks like a veteran shutdown corner. Heading into the Sooners' battle with Texas at 11 a.m. CT Saturday at the Cotton Bowl in Dallas, Colvin could be a difference-maker against the Longhorns.

“You have to have great corner play to have success in any league,” said defensive coordinator Mike Stoops. “Aaron is a very complete player, he does way more than cover. He’s very instinctual, he finds the football very quickly, he understands concepts. From Day One, once he got healthy, I knew he was a special player.”

After missing the spring with a shoulder injury, Colvin moved from safety to cornerback this fall and has played at an elite level through four games.

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We'll be walking through the top 10 players at each position in the Big 12 before the season, but we'll start with the most important, especially in this league.

Let's do this:

1. Geno Smith, West Virginia: Smith put up huge numbers (4,385 yards, 31 TD, 7 INT, 65.8 completion percentage) and did so efficiently last season. Both of his top two targets are back and the adjustment to Big 12 defenses shouldn't be too difficult.

2. Landry Jones, Oklahoma: Jones and Smith will go head-to-head all season for honors as the Big 12's top passer. Who comes out on top is anyone's guess, but Jones regressed last season, and his receivers let him down after Ryan Broyles' season ended with a knee injury. He'll try to bounce back with just one reliable target (Kenny Stills) to start the season. The rest of the receiving corps is loaded with potential, but very inexperienced.

3. Collin Klein, Kansas State: Clearly, I'm taking more than just passing acumen into account here. Klein is the Big 12's No. 2 returning rusher, and also threw for just under 2,000 yards last season, adding 13 passing touchdowns to the 27 he scored rushing. We'll see how much better he is as a passer this fall.

4. Seth Doege, Texas Tech: I refuse to hang last year's failures on Doege's shoulders. Absolutely not. He played well, at least as well as he could. The running game struggled and offered almost no support after Eric Stephens' injury. The defense was a disaster and there were injuries all over the place. Doege still went for more than 4,000 yards, 28 scores and just 10 picks. Don't be surprised if Doege throws his hat in the ring as the Big 12's best passer by season's end.

5. Casey Pachall, TCU: Pachall didn't have eye-popping numbers, but only because TCU rode on the shoulders of its trio of running backs. Still, Pachall's numbers are going to be better this year, and he's got great targets in Josh Boyce, Skye Dawson and Brandon Carter, not to mention youngster LaDarius Brown.

6. Nick Florence, Baylor: I like Florence to have a big year with really good receivers, but he's got too much to prove for now. He looked good in spot duty for RG3 against Texas Tech last season, but his senior season will look much, much different than his inconsistent freshman year all the way back in 2009.

7. Wes Lunt, Oklahoma State: The Big 12's only freshman quarterback is a true freshman, and Lunt earned this spot by beating out some really tough competition in J.W. Walsh and Colton Chelf this spring. Amazing stuff, and his coaches know good quarterbacks. Zac Robinson and Brandon Weeden have established quite the QB tradition in Stillwater. Here's guessing Lunt continues it.

8. Dayne Crist, Kansas: Crist's college career hasn't been what he imagined after coming to Notre Dame as one of the most highly recruited signal-calling prospects in his class, but he's got a chance to start something special at Kansas in his senior year, reunited with former coach Charlie Weis. Crist won't have the weapons some of the other guys on this list have, but he gives KU a big, big upgrade at the position.

9. Steele Jantz/Jared Barnett, Iowa State: These two have to cut down the turnovers, but they've both shown the ability to be playmakers. There's no guessing who wins this legitimate battle in the fall, but coach Paul Rhoads isn't afraid to bench either one if the turnovers don't stop.

10. David Ash/Case McCoy, Texas: Mack Brown insists it's still a contest. My jaw will be on the floor if Ash doesn't trot out on the field for the first game of the season. Ash has some potential and promising targets in Mike Davis and Jaxon Shipley, but he hasn't shown the big-play ability of Jantz or Barnett. Expect Ash to move up this list by season's end, but for now, it's all just potential.

Colleague Travis Haney was on hand at Big 12 Media Days, but has a column this week looking at the league's top contenders' Achilles' heels.

If something's going to stop them from winning it all, what'll it be? I'd basically agree with all of them. Check out the full post to see his thoughts.

Texas? It's those quarterbacks, who threw too many interceptions last year.

Case McCoy actually didn't throw a pick until the season finale, but once he did, they came in bunches. He tossed four against Baylor on the final weekend, and added a fumble on a mishandled snap. Ash, though, was plagued by decision-making problems that put a stout defense in poor situations all too often. He also fumbled four times.

They say if you can play defense and run the ball, you're going to have success. West Virginia's had success, but hasn't been stellar at either. It's continual regression in the running game could post problems for the Mountaineers, writes Haney.

Oklahoma's problem last year was obvious, and anyone who watched the loss to Baylor and Texas Tech saw it. Big plays through the air. Mike Stoops will have to fix it, but even though safety Javon Harris re-emerged this spring to take back the starting spot he surrendered last season, he's got to prove he can plug the holes in the back end of the defense.

Handling a physical Big 12 could be a problem for TCU, who could far too often roll over outmanned opponents in the Mountain West. Can K-State make its offense truly two-dimensional?

Read Haney's full story to find out.

Last season, Oklahoma or Texas failed to win the Big 12 for the first time since 2003.

How?

Well, Oklahoma State had a little something to do with it, but so did two huge positions in need of improvement.

Both cracked colleague Travis Haney's list of positions with the potential for huge growth in 2012.

First up, the Texas quarterbacks.

Texas seemed to indicate it would like for the more athletic [David] Ash to be the guy, even as a freshman, but he could not sustain enough consistency to win the job outright. And, really, Ash simply could not take care of the ball. He threw an interception every 21.8 passes. (The most efficient quarterback in 2011, Wisconsin's Russell Wilson, threw one every 77.3 throws.

[Case] McCoy was more consistent in November, but no one was mistaking him for his older brother in terms of arm strength and accuracy. He did put up a 356-yard passing day in the loss to Baylor at the end of the regular season, but McCoy then gave way to Ash for the bowl victory against Cal. It was a yo-yo effect all season for the Horns, who would like to see one of the two emerge -- but still haven't really through spring ball.

My take: I totally agree with this one. How much Ash improves is the big question. An offseason full of first-team reps will be extremely valuable -- he got almost none last year before being thrust into the role of starter as a true freshman. During spring camp last year, he was a fourth-stringer. He could get better, but Ash has never really looked the part of future superstar to me. Fortunately for the Longhorns, the team is good enough everywhere else it doesn't need him to be a superstar. If he's solid, but able to get the ball to Texas' playmakers like Jaxon Shipley and Mike Davis, the Longhorns will be a factor in the Big 12 race.

Second, Haney looks at the Oklahoma defensive backs, who are under new direction this year with Mike Stoops.

Stoops has a variety of options for the different spots in the defensive backfield. Already, he has shifted Tony Jefferson from sam linebacker to free safety, his more natural position, and moved Javon Harris from free to strong safety. Harris was the goat in several games, including the Baylor debacle. Jefferson might be the most underrated defensive player in the Big 12 because he has yet to settle into one, specific position.

Another important piece of the OU defense, Aaron Colvin, missed the spring after minor shoulder surgery. He can play any of the secondary spots, again freeing up Mike Stoops to mix and match to find a solution for the big-play disease.

My take: The league's best quarterbacks gave the Sooners all kinds of trouble last year, and it won't be much easier this year. Yeah, Brandon Weeden and Robert Griffin III are gone, but TCU's Casey Pachall and West Virginia's Geno Smith are the new guys very capable of tearing up anybody's secondary.

It's tough to know exactly what the problem for Oklahoma was. The Sooners could be dominant at times. They have the talent and athleticism. Most importantly, they have lots of experience. For OU, it's a matter of just doing it. Stoops will try to make it happen, but big improvement could result in a big, big year for the Sooners.

A national title, perhaps?