For nearly a decade, the Kansas City Chiefs have been the NFL's most successful team. They have secured nine straight AFC West titles, appeared in eight consecutive AFC Championship games and reached five Super Bowls, winning three of them.

But in 2025, the vaunted Chiefs suddenly find themselves in unfamiliar territory. After a crushing 22-19 loss to the Denver Broncos on Sunday, they have a mediocre 5-5 record and are ranked ninth in the AFC, outside the playoff picture.

What’s gone wrong with the Chiefs? Here are four key reasons why the team is no longer the juggernaut it once was.

1. Not beating good teams

The Chiefs are winless against teams currently in playoff position, and their 30-17 Week 6 defeat of the Detroit Lions is their only win versus a team with a winni

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