1921 Rock Island Independents season Tags: National Football League Season.The 1921 Rock Island Independents season was their second in the National Football League. The team failed to improve on their previous record against league opponents of 6–2–2 winning only four games. They finished fifth in the league. coach Jimmy Conzelman, Frank Coughlin team Rock Island Independents year 1921-01-01T00:00:00+02:00 Learn more... Loading...