I do not trust this guy’s descriptions at all. All of his cabinets depict men in suits. What about cabinets showing the player in their uniform?
I do not think that is Walter Johnson in the postcard either.
Here is a list of his recent sales on ebay, including some that he sold via an auction vs fixed price:
https://www.ebay.com/sch/i.html?sid=...te=1&LH_Sold=1
Obviously, looking at the pathetic prices realized with his auctions, it does not seem as though many people agree with his identifications.