That strange rule no one seemed to know about had a major impact on the Week 1 game between the Saints and Lions. And there’s a reason no one knew about it, beyond the fact that it apparently had not been applied in years, if ever.

A very similar play happened during the AFC Championship. But the rulebook’s get-out-of-backward-pass-free card was never mentioned.

It started with 2:59 to go in the first half. The Broncos, leading the Patriots 7-0, had the ball at their own 33, facing third down and four. Denver quarterback Jarrett Stidham ( not Drew Brees ) got the snap in shotgun formation. Stidham dropped back, apparently looking to set up a…

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