KANSAS CITY, Mo. -- The Kansas City Chiefs have proven this season that they can beat just about anybody when they're playing their best.

They can lose quite easily when they are not.

It's a marked difference from past years, when Kansas City could overcome penalties, dropped passes and other miscues to win anyway. The Chiefs went 15-2 last season largely because they were able to stay in games they had no business winning, but the good fortune has not carried over; they find themselves 5-4 after a 28-21 loss in Buffalo on Sunday.

"We've had great moments and we've had bad moments," Chiefs quarterback Patrick Mahomes said. "We've got to be more consistent as a team. I've got to be more consistent at quarterback. We've got to be able to battle.

"We've been in a lot of these types of clo

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