The team improved on their 10–1–2 record from 1920 to a 9–1–1 record under head coach/player George Halas earning them a first-place finish in the team standings and their first league championship (the best finish of the 1st Halas era). The beginning of the season saw A.E. Staley turn over the team to Halas and Dutch Sternaman, who moved the team to Chicago.
Under George Halas' leadership, the team improved its record from 10–1–2 in 1920 to 9–1–1, securing a first-place finish and their inaugural league championship (the most successful season of the 1st Halas era). The beginning of the season marked a transition when A.E. Staley transferred control to Halas and Dutch Sternaman, who then moved the team to Chicago.