Each week, Sporting News' Matt Hayes ranks the Division I-A conferences and the teams within each league. 5. Big 12 1. Texas 2. Oklahoma 3. Oklahoma State 4. Texas Tech 5. Kansas State 6. Kansas 7. Texas A&M 8. Nebraska 9. Missouri 10. Iowa State 11. Colorado 12. Baylor Rising Texas A&M: One day Mike Sherman is fighting off firing rumors; the next, the Aggies are winning back-to-back games and need to win at Colorado this week to become bowl-eligible. Falling Colorado: The issue isn't the coach's son at quarterback or the backup fans crave. It's a defense that has given up at least 30 points five times this season. Matt Hayes covers college football for Sporting News. E-mail him at mhayes@sportingnews.com.