What's the common theme in the AFC West? Poor run defense. The Chiefs are starting to look like, at least, a serious monkey wrench in this division. Run defense is the Achillles heal of the Chargers, as the Chiefs are showing tonight. Oakland is hopeless in run defense. The Broncos have some huge question marks in run defense right now. This year might hang for them on whether they can beat non-divisional opponents. The Broncos had better win some MF games and soon. If the Chiefs can go 6-0 in the division, they'll only have to win 4 other games to take the West.