I've noticed several this season, and it always surprises me when they don't call it. Is there a rule about how far forward they have to go before it's a penalty?
I don't think so, although the NFL's guidance on officiating goes beyond what is strictly in the rule book to video explanations.
And even if they don't come forward, if they stop moving laterally across the LOS, shouldn't they be required to be set for a second?
It says to me:
You can be moving laterally or backward.
You can't be moving forward.
If you stop, i.e., are not moving laterally, you have to be set for a second.
There is *some* allowed movement forward when say a TE moves from one end of the line to the other and gets set. He gets up, moves back behind the oline, goes across, then moves forward back in line with the oline. That isn't a penalty. They're not require to crawl over the oline to go from covering one side to covering the other.
Ah. Players can move forward to get in position provided they get set for a second in that position prior to the snap.
Either they need to be in motion laterally or backward, or they need to be set for a second. I can see them giving them a pass on stopping their lateral motion and moving forward a little to "get in position", even if that's just standing somewhere in the backfield, but that should still require being set for a second.
The thing about it is, I think it stood out to both of us because it seems new. Like teams didn't used to do this, or at least didn't used to get away with it. Yet there were no rule changes associated with illegal motion.
https://operations.nfl.com/the-rules/2019-nfl-rulebook/#article-8.-illegal-motion.
ARTICLE 8. ILLEGAL MOTION
When the ball is snapped, one player who is lined up in the backfield may be in motion, provided that he is moving parallel to or away from the line of scrimmage. No player is permitted to be moving toward the line of scrimmage when the ball is snapped. All other players must be stationary in their positions.
If an eligible receiver who is on the line moves to another position on the line (not forward), he must reset prior to the snap. If he does not reset, it is Illegal Motion.
It is also Illegal Motion if a player under or behind center goes in motion and fails to come to a complete stop for at least one full second prior to the snap.