The two-time defending champs finally lost a game, while the Steelers and Eagles continue their climbs toward the top.

I guess the window was still open after all. Probably wide open in fact. Remember all that preseason talk of how the Buffalo Bills' window for winning had closed, how it was over for them, how the roster turnover would change the team's fortunes and that they couldn't get past those losses on the field in the playoffs and on the roster?