Obviously, it CAN be, it's very very rare. So, we don't expect it. Folks here are smart enough to understand it COULD happen.
Imagine this coming season for example, Bama finishes 13-0, UGA loses to them late (duh) and is 12-1, and A&M is 11-1 with a close lose at Bama and blow outs.
Other teams have two losses, or lose in a bowl game.