The Chiefs are the most vulnerable 12-1 team in NFL history
You're not used to the Kansas City Chiefs.
The two-time defending champion Chiefs are 12-1 going into this weekend, leading the AFC, and many people still likely believe they will be the conference's representative in the Super Bowl.
That's the typical portion.
The portion that's not so normal? In practically every game, Kansas City is barely winning. The Chiefs' victories are so close together that their plus-56 point differential is more akin to that of the NFL's worst club (the Carolina Panthers) than its greatest (the Detroit Lions).
This season, Kansas City has been like that. The Chiefs, who have won three Super Bowls in five years, have one of the best coaches in the league, and 29-year-old Patrick Mahomes may retire today and still be eligible for the first ballot Hall of Fame.
How...