Blocking a receiver Question

[Juxone]

Originally Posted by JRutledge

There is more to it than where the receiver is in relationship to the yard line the defender is on. If the receiver is clearly running a route, then you have to have a foul. But this is where football IQ comes into play, you often know when there is doubt.

I think the part of "..If the receiver is clearly running a route, then you have to have a foul." answers my question, it is a foul regardless and if the ball is in the air it become DPI??

So if the ball is NOT in the air what is the call?? Holding?