It's possible. And almost a certainty if Clemson were to somehow lose.
I just don't like the "pick the four best" that the committee is charged with. On one hand that makes sense. On the other, why can't we look at each conference being its own bracket into the playoff? If you weren't the top team in your conference, then by definition you cannot be the best team in the naiton.
I realize pro sports has wild card teams, etc., but that's more of a money grab than integrity of the postseason. And even in pro sports, if you're third-best in your division or conference, you can still be left out of the postseason in favor of an inferior team that had a much weaker division and schedule.
As long as there are more conference winners than playoff spots available, we need to limit it to one team per conference.