We knew it would happen. It always does year after year. It was only a matter of time before teams in the top five started going down, shoving the revolving door that is the BCS. Oklahoma and Wisconsin bit the dirt this week, one losing on a last-second Hail Mary, the other giving an in-state rival the green light by getting embarassed at the hands of an unranked opponent. Houston's return headlines five teams that were not previously in our poll. They are still undefeated after all. Read on to see what Big 10 teams are shaking things up and who we think has the gas to make it to the finish line first.