It’s down to a dozen.

At the midpoint of the regular season (seven full weeks in the books, seven more to come before the conference title games), there are 12 undefeated teams left in the FBS. Not all unblemished records are the same, and some of those perfect teams have far better playoff prospects than others.

Nonetheless, it’s a manageable enough group to break down as the second half of the season gets underway.

Alabama (6-0, 3-0 SEC)

Best win: Maybe last week’s victory at 3-3 Texas A&M? The Crimson Tide has only upended two teams who currently boast winning records (Duke and Southern Mississippi), and games against Tennessee and Arkansas the next two weeks won’t help on that front. Toughest remaining test: Nov. 9 vs. Louisiana State. The two other games that could create headaches are at Auburn (Nov. 30) and a possible SEC title game (Dec. 7), but the Tigers look like the biggest obstacle for Nick Saban’s team. Best guess at first loss: Some point in the playoff, if it happens at all.