On Deck Rules Question

[atlitp4785]

Last night at my son's (14 yr old Pony league) game he was in the on deck circle. The batter hit a foul tip over the fence (20 feet high). The trajectory of the ball was right over my son's head while standing in the on deck circle. The catcher ran over to attempt to catch the ball, even though it was over the fence and foul, and pushed my son out of the way as he also looked up at the ball.
The umpire called my son for interference and the batter out.
None of the coaches have ever seen such a play and did not argue the call.


Is this the correct call?