keep reading......
"Note: If there is any question whether player contact is incidental, the ruling should be no interference.
Article 3. Permissible Acts by both teams while the ball is in the air
Acts that are permissible by a player include, but are not limited to:
Incidental contact by an opponent’s hands, arms, or body when both players are competing for the ball, or neither player is looking for the ball.
If there is any question whether contact is incidental, the ruling shall be no interference.
Being the defender looked back, it is not PI.
Off sides can occur for both offense or defense. Or they could have called it as false start.
He clearly is not playing the ball or competing for the ball. He is beaten on the play and is trying to hold back the receiver.
If this is legal coverage, I hope Brian Flores calls the Dolphins secondary together for a meeting:
"Gentlemen, if you are beaten on a play, just grab the receiver's arm and turn back."
Hit the pause button at 18 seconds.
I did watch the Philly Special. I didn't see a false start. I do remember a formation controversy on that play, however, the receiver did check with the ref before the play started, which makes it legal.