We begin the same as last week, pointing out that the Buffalo Bills remain undefeated — only now heading into a Week 5 matchup with the New England Patriots. The Bills are the only undefeated team in the AFC, and one of just two overall with the defending Super Bowl Champion Philadelphia Eagles the other 4-0 squad.

Buffalo is once again among the NFL’s best teams, but they aren’t without flaws. A fair amount of Bills Mafia remain concerned about the defense, which has taken its lumps in playing a bend-but-don’t-break style that’s also incorporating more man-cover looks than historically under head coach Sean McDermott.

With quarterback Josh Allen, elite play is a given. However, it’s running back James Cook and Buffalo’s run offense that’s really decimated teams in September. Of course,

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