Bump and run?

[BktBallRef]

Came across this question on another forum. Please offer some replies so that I may forward them to the poster.

"Is it legal for a defender or defenders to prevent the realese of the TE by double teaming him?

Could someone give me the correct rule as it applies to bump and run coverage? I was under the impression that you can't keep hitting a reciever on the LOS unless he is blocking the defender. I believe the rule makes it clear that if the reciever tries to release out on pass and is clearly not blocking or attempting to block a defender any contact would be considered pass interference."

I've replied but I need some reinforcements.