By KRISTIE RIEKEN
AP Sports Writer

HOUSTON (AP) - The Houston Texans were up 24-0 in the first quarter against the Kansas City Chiefs and looked to be headed for their first AFC championship game, which they would have hosted. Then everything fell apart. And now instead of preparing for another playoff game, the Texans are left to wonder what might have been after allowing Kansas City to orchestrate the biggest comeback in franchise history in a 51-31 win.

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