Chiefs fans should know this extremely encouraging statistic

Kansas City capped its undefeated preseason with a 24-17 victory in St. Louis on Thursday night.

That's only happened twice before, and all fans should love this trend courtesy of ESPN's Adam Teicher:

Exhibition play is no harbinger of regular-season success. Just ask the 2008 Detroit Lions, who also went unbeaten that year before losing all 16 games.

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Still, it's encouraging to see the Chiefs clicking on all cylinders before Week 1. And maybe -- just maybe -- one of the teams that made the inaugural Super Bowl will end up in it's 50th game.

(h/t ESPN)