It seems like the only way this is possible, within reason, is if the loser of the Big 10 championship game, the loser of the SECCG, AND Ohio State all stay above us in the rankings.
Seems like an unlikely scenario, but definitely possible that the seeding looks something like:
1. Oregon
2. Texas
3. SMU
4. Boise State
5. Notre Dame
6. Penn State
7. UGA
8. Ohio State
9. Tennessee
Personally, I think the committee will allow the losers of championship games to hold their spots above us and we edge out Ohio State for the 8 seed.