One hand or two hands

[Smitty]

Originally posted by Ref in PA
What if the defender's one hand is pinning the ball to the body of the offensive player (along with the offensive player's arm pinning the ball to the body)? How is that different than one hand blocking a try that results in a held ball? In both cases the ball was pinned and not moving.

The difference is that the offensive player could simply pivot and pull the ball away from the defender. The defender doesn't have any grip on the ball such that it can't be pulled away.