The list was the sole creation of Bruce Copeland, sports editor of the Rock Island Argus, one of the most pro football-centric newspapers of the day.
It has been noted that since this was the list of a single sportswriter, there appears to be a discernible bias towards the "home team," the Rock Island Independents, in Copeland's choices.
[1] Copeland himself stated that his selections were based upon personal observations and "past acquaintance with most of the players with the Akron Indians, Canton Bulldogs, and Cleveland Tigers, which did not play this year in Rock Island.
[2] Rock Island end Oak Smith is lauded, for example, as one who could "not be boxed" and who "broke through opposing lines almost at will, spilling the runner, interference, or blocking punts.
"[2] On the other hand, the two top receiving ends in the league in Copeland's estimation, Dave Reese and Dutch Thiele of Dayton, are dismissed as "woefully weak" on defense, "as was demonstrated by repeated gains in their direction" during their 1920 appearance in Rock Island.