Let's see, there's the defending national champ, a perennial contender and a handful of other teams that could challenge for the national title as well. Hmmm...think the Big 12 is back?

But there are questions for everyone. Oklahoma looks to defend its national title, but must replace QB Josh Heupel. Nebraska reloads at offensive line and is still looking for a running back to emerge. Then there's Texas and K-State. Both have the talent, but there are plenty of problems as well.

ESPN.com continues its look back at the spring with a team-by-team look at the Big 12. Just click on the team to find out how it fared this spring.

Big 12 Spring Recaps
Team	Comment
Baylor Bears	Installing spread offense that rejuvenated Clemson.
Colorado Buffaloes	RB Marcus Houston sat out spring drills with injury.
Iowa State Cyclones	QB Seneca Wallace turned heads this spring.
Kansas Jayhawks	Zach Dyer and Mario Kinsey in tight battle at QB.
Kansas State Wildcats	Wildcats actually have special teams questions.
Missouri Tigers	New coach Gary Pinkel changed from 4-3 defense to 4-4.
Nebraska Cornhuskers	Huskers still looking for I-back to emerge.
Oklahoma Sooners	Sixteen starters return for defending national champs.
Oklahoma St. Cowboys	New coach Les Miles looks to put the ball in the air more.
Texas Longhorns	Chris Simms era begins in Austin.
Texas A&M Aggies	Aggies going back to a more balanced offensive attack.
Texas Tech Red Raiders	Tech focusing on offensive line.