Originally Posted by -King-
I don't know if sign boards would work in the NFL. And the hand signals/vocal audibles occur after the huddles for the most part. Even Peyton Manning teams still huddle for the majority of the plays.
There's no reason why a sign board wouldn't work in the NFL. It looks foolish, but the concept of coding a play is commonplace.
The K-Gun worked pretty well for Buffalo. There's no reason why any NFL QB couldn't call his own plays.