Not only is the sixth seed wide open, but none of the division winners know their seed yet. Three division titles were clinched on Sunday. New England won the East with Miami's loss, Denver won the West thanks to a win and a Kansas City loss, and the Bengals won the North because of their win and the Ravens' loss. But the Broncos haven't clinched the No. 1 seed yet, and the Patriots haven't clinched the No. 2 seed and a bye either, but can with a win next week. New England would get the top seed with a win and a Broncos loss, but the Bengals or Colts could still move up to the No. 2 seed if the Patriots lose. And the Colts or Bengals could end up as the No. 3 seed, and thereby avoid playing at the No. 1 seed in the second round.
In the wild-card race, the most obvious way to determine a winner is if one of the 8-7 teams wins and the other two lose. San Diego plays Kansas City, Baltimore plays at Cincinnati and Miami plays the Jets.
If there's a two-team tie, the Chargers would lose the tiebreaker to the Dolphins or Ravens. The Ravens have the tiebreaker over the Dolphins. If those three teams all tie for the final spot, the Dolphins win the tiebreaker.
The Steelers are also mathematically alive, but would need all three teams a game ahead of them to lose, and to beat the Browns in Week 17.