Posted By:
MWJay,
The Anonymous Mayo football card was never researched because nobody really cared that much about football cards until the late 1980s. In fact, the first Sports Americana Football & Basketball Card Price Guide (Beckett & Eckes, 1979) does not even have a listing for the N302 Mayo set. Starting in the mid 1980s the card was listed as anonymous only because there was no identification on the front of the card as to who the player was.
According to the Beckett Football Almanac, 2003-2004 edition:
"One of the cards has no specific identification of the player (John Dunlop of Harvard) and is listed below as anonymous."
Incidentally, all of the major price guides, including both Beckett (referenced above) and SCD's Standard Catalog of Football cards do list the player's name along with the label "anonymous." The mere fact that the player's name is known does not change the reality that the player's name is not listed on the card.