ARTICLE 2. Illegal Forward Pass
A forward pass is illegal if:
- It is thrown by a Team A player whose entire body is beyond the neutral zone when he releases the ball.
When determining whether a forward pass is illegal, refs look to whether his entire body is past the line of scrimmage "when he releases the ball." Sure, it doesn't say fingertips, but obviously it's the same thing.
Reference to McSorley was a key play that was ruled an illegal forward pass because he was past the line of scrimmage when he released the ball. If the rule weren't measured by when it left his fingertips, but rather when his arm started going forward, it would not have been a penalty.