In an NFL season where so many teams are tightly packed at the top of their respective conferences and divisions, every week of football in December is going to drive massive changes in the league's playoff picture . Thursday's win by the Lions over the Cowboys kept Dan Campbell's team in the race with its divisional rivals for a wild-card spot, while Dallas saw its own push into the postseason derailed. The Cowboys' playoff odds were more than cut in half, per ESPN's Football Power Index (FPI)

There were more significant swings on Sunday , especially in games where teams with realistic playoff aspirations were pitted against one another. With three potential playoff teams on bye and two more still to meet when the Chargers and Eagles play on "Monday Night Football," there wer

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