We have to way back for this one as Al Nesser played in the NFL from 1920 to 1931, and predated that before the NFL formed with a decade in the long-defunct Ohio League.  Nesser was one of six brothers who played pro football, and he was the last player in professional football not to wear a helmet.  He was a member of two NFL Championship Teams, the Akron Pros in 1920, and the New York Giants in 1927.