Illegal shift?

[wisref2]

You might be over-thinking this. Don't think about how many people are shifting - it is a shift going from the huddle to the LOS, so that's 11 people all shifting at the same time and is perfectly legal. It is a shift when linemen go from 2 point stance to 3 point stance - so that's 5 or 6 people shifting at the same time.

Are all 11 players set for one second before the snap? If so, legal.

If there is a one motion man at the time of the snap - were all 11 players set for one second before that player went into motion? If so, legal.

Backs A1 and A2 are set up wide to the right. They go into motion together and reset behind the QB. They are set for 1 second, then the ball is snapped. Legal.

Backs A1 and A2 are set up wide to the right. They go into motion together and reset behind the QB. They are set for 1 second, then A1 goes into motion and the ball is snapped. Legal.

Backs A1 and A2 are set up wide to the right. They go into motion together and A1 stops behind the QB but A2 remains in motion. The ball is snapped. That is a foul. Let's not argue whether it's illegal motion or illegal shift - it is one or the other!