||Playoff win %
John George Chalmers
John Armstrong was a football coach in the National Football League (NFL) during the 1924 season as the head coach of the Rock Island Independents. During his lone season in the NFL the Independents went 5-2-2. He was the head coach of the Independents for the 1924 season. The Independents went 5-2-2 in this lone season as a head coach. During his career he was a head coach for one season.
Rock Island Independents
Coach history guide
|Seasons with a championship win
||Seasons with a conference championship