Just when we were beginning to confidently pick the real Super Bowl contenders, Week 9 shuffled the top of the NFL's deck.

Four of the five favorites to win this season's title by ESPN's Football Power Index (FPI) lost on Sunday. The only team in the top five to make it through the weekend unscathed was the Eagles -- who were on bye. And after Sunday's series of upsets, each team has at least two losses on its record by Week 9. That has happened only one other time in the past 35 years, a 2010 season where the eventual Super Bowl champion Packers finished the regular season as the sixth seed in the NFC.

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I'm going to break down those four Super Bowl contenders -- the Chiefs, Colts, Packers and Lions -- who lost in Week 9, including what happened

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