The Chickasha Chicks, Clinton Bulldogs, El Reno Railroaders, Guthrie and Wilson Drillers teams joined Duncan in beginning league play on May 20, 1922.
Specifically, the Rock Island Oil & Refining Company was established in Duncan in 1922, corresponding with the Oilers minor league team beginning play.
Duncan ended the 1922 regular season with a record of 67–43, finishing 4.5 games ahead of the second place Clinton Bulldogs.
[4][5][2] In their second season of play, the 1923 Duncan Oilers again had the best record in the league, as the Oklahoma State expanded to eight teams.
[2] Playing under returning manager John Fant, Duncan was 17.5 games behind the first place Pawhuska Huskies when the league folded.