Halas was a pioneering football player, coach, and owner of one of the 11 original teams in the American Professional Football Association (APFA), the Decatur Staleys. Founded in 1920, the APFA went on to become the National Football League (NFL) in 1922—the same year Halas moved his team to Chicago and renamed it the Bears. Under his leadership, the Chicago Bears won seven NFL championships. In addition to coaching, Halas also played what position during the 1920s? Discuss
Source: The Free Dictionary