David Helman brings the Chiefs up from fifth to fourth in his Week 17 power rankings, pointing to a nearly flawless record against projected playoff teams.

The regular season is done and through a series of close wins, combined with a strong finish before Week 18, the Chiefs went 15-2. They're the No. 1 seed in the AFC and they're two home wins from another Super Bowl. A couple teams from our list of the five biggest threats to knock off the Chiefs didn't even make the playoffs. A few remain.