[JRutledge]

If you mean that he happens to be touching him with the elbow or arm bar, then I would agree that is not likely a foul. But if it is being used in any way to either contact the post player, then I likely have a foul. It is really hard to say without actually seeing the action. I will give benefit of the doubt to a player that just has their arm in front of their body in a more natural movement, but when they extend at all, I have a foul.

Peace