According to the linked story, he worked at the postal service as a clerk for two years before becoming a carrier. His entry-level position may not have required much reading.
I've taken apart quite a few golf balls back in my childhood. They were made of rather stiff vinyl on the outside, rubber bands made up most of the inside, and the center was a liquid-filled rubber ball. Have they changed that much since then?
No one ever promised free speech on this privately-owned blog.