Good work on that list, Peirce!
I would encourage you to consider adding pre-rookie cards to your spreadsheet as you might find it interesting to go after image of players that don't have a mainstream cards from their playing days.
I personally find it very distasteful that cards from the 1970s-80s (Touchdown, Fleer Immortals, etc.) are considered a rookie card for players who played decades and decades earlier. It me it makes more sense to pick a regional, team, postcard, etc. of a player from their playing days as their rookie card than some tribute set from decades later.
This is one of the reason I like to collect pre-rookie cards. Putting the registry craziness aside, I'd rather have a card of a player from their playing days even if the set isn't mainstream.
jeff
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