The problem with Kansas City.....

Make no mistake. The KC Chiefs are a really good football team. You don't get to be 5-0 in the NFL unless you're doing a lot of things right.

Second year quarterback Patrick Mahomes has surpassed all expectations since he took over the starting job this season. He's mobile, fleet of foot, can make all the throws, and has terrific "vision" regarding when his receivers will come open.

And he just threw for over 350 yards and another two touchdowns against the New England Patriots.

But the Chiefs still lost the game.

Forty points is a lot in any typical NFL game for a team to score. Normally, that's more than enough to win. And the Chiefs put up 40 against the Pats.

Problem is, they wound up surrendering 43.

If you're giving up that many points a game, something is horribly wrong with your defense.

It appears the Chiefs can't generate much of a pass rush, and their secondary somewhat resembles a screen door on a submarine trying to cover receivers. Given few would doubt the NFL, and most colleges as well, have morphed into pass-happy offenses, the "running game" is quickly becoming a thing of the past. Or perhaps exists only to keep defenses "honest".

It's not like Tom Brady and the Pats are some sort of offensive juggernaut. They don't do anything spectacularly well. But give #12 "all day" to throw, and chances are he's going to find a receiver eventually. The Chiefs couldn't seem to pressure him much at all.

Couple that with tight end Rob Gronkowski torching a defensive back on the crucial play of the game towards the end -- on a simple fly pattern, at that -- and it spells trouble. Granted, Gronk is a very talented guy, but there's no way he's supposed to out-run a defensive back.

So now the Chiefs have fallen from being undefeated.

Score 40 points -- on the road, no less - and still lose?

Oh my. Head coach Andy Reid and his staff have some serious work to do with the KC defense.

Because that just won't get it, especially come play-off time.