I'm not underestimating anything. There's just no chance that would happen.
If Alabama loses to LSU, they will be the highest-ranked one-loss team.
2) Florida State
3) Ohio State
You forget that Stanford will also probably lose two days before to Oregon. Miami will lose next week to Florida State. There won't be that many teams left for them to drop behind. They'd absolutely be in the top 5 still.
ETA: Baylor plays at Oklahoma that Thursday too. If they lose, Alabama falls to #4 IMO.
This post was edited on 10/27 at 2:22 pm