Not sure if anybody has posted about this, but figured that I would share just in case.
I just watched a really interesting episode of "The Sweet Spot: A Treasury of Baseball Stories." You'll need amazon prime/prime video to watch it. Season 1, episode 5 is about a baseball photographer who ended up working for Topps. He also made postcards and personal photographs for professional players. Well worth the 30 minutes to watch it.
https://www.amazon.com/Sweet-Spot-Tr.../dp/B01MUSAKM8