We seen a couple of bucks like that around our camp in Colorado...game warden came by one day and ask if we had seen them hanging out...he said they were an expirement the bucks were casterated and there antlers were just like that one.
I wonder what kind of an experiment they would be doing by castrating bucks. It's common knowledge that a buck that loses his goodies will keep whatever rack he has at the time and will not shed it.