The Kansas City Chiefs are a perfect 4-0. But are they any good?

The Super Bowl champions are off to an unbeaten start. But turning Patrick Mahomes into a checkdown artist seems reductive at best

Any coach in any sport will tell you that a win is a win: no matter how you get there, it's a good thing. But how good can the defending Super Bowl champion Kansas City Chiefs feel about their 4-0 start this season after Sunday's scratchy 17-10 win over the Los Angeles Chargers?

Yes, the Chiefs are undefeated, but their point differential of +20 shows just how vulnerable they've been and they could easily be 1-3 - or worse - if a few plays had gone differently in each of their games this season. This Chiefs team looks like last season's, when they had to hope for Patrick Mahomes to get hot at the right time in an uneven offense with mystery receivers.