These cards use the same pose as the "spats" players in the set, as follows:
Welch is Keefe's pose
Clark is Kelly's pose
Phillips is Anson's pose
This is far out, but maybe someone from New York and some how connected with Buchner was not happy that star pitcher Welch was left out of the set and disappointed that there were only 3 Brooklyn players were in the set; and no I don't believe in Bigfoot.
Anyway, very interesting cards