Ok I just watched the replay of the PI again, in slow motion, both have their heads turned looking for the ball. The receiver puts his arm over the short defenders shoulder and the defenders is the one that is pushing himself off the body of the receiver.
I might be wrong but don't they both have a right to that ball? I say again I didn't like that call. They were both going for it, no hands ever touched each other for a push. it fell the ground. should have just been left as is.