What happened: Kansas City has allowed 139 points, Pittsburgh 144 and San Francisco 154, rounding out the five stingiest defenses in the league this season.
Why it matters: Minnesota and Jacksonville are both 6-2. The Jaguars hold the AFC's third seed, while the Vikings sit sixth after losing their last two.
By the numbers: Fewest points allowed this season: Vikings 116, Jaguars 121, Chiefs 139, Steelers 144, 49ers 154.
What to watch: Jacksonville, five points behind Minnesota, is the closest challenger for the league's top scoring defense.