One of these weeks, the weather won't play a prominent role in a game ... but Week 16 against the Chicago Bears is not that week. What did the Buffalo Bills and its run defense learn against Miami, and what should it expect against a Justin Fields-led offense that's last in the league in passing attempts? Katherine Fitzgerald and Mark Gaughan preview the Christmas Eve contest in Chicago and also handicap the race for the top seed in the AFC playoffs. Which teams should the Bills or any top contender look to avoid? The answer may not be that easy. 

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