The four AFC teams still alive in the playoffs represent a victory for sports' universal underdog: the small-market team.
The intrigue: The Bills, Bengals, Chiefs and Titans form the smallest average media market size of any conference's final four since the 1970 AFL-NFL merger.
Buffalo (32nd-biggest media market of 32 NFL teams, per Nielsen)
Cincinnati (27th)
Kansas City (26th)
Nashville (25th)
Of note: Their franchise valuations are similarly low: Bengals (32nd), Bills (30th), Titans (28th), Chiefs (20th).
The big picture: The AFC is the "small-market conference," with just four of the top 17 NFL teams by media market size: Jets (t-1st), Chargers (t-3rd), Texans (10th) and Patriots (12th). The other 13 are all NFC teams, including the entire NFC East and NFC West.
What to watch: If the Buccaneers (15th) and Packers* (28th) beat the Rams (t-3rd) and 49ers (8th), respectively, they'll join the AFC in forming an all-small-market final four.