Frank Xavier Rydzewski (November 16, 1892 – October 1979) was a professional football player in the National Football League. He played seven seasons in the NFL with the Chicago Tigers (1920), Cleveland Tigers (1920), Hammond Pros (1920, 1922–1926), Chicago Cardinals (1921), Chicago Bears (1923), and Milwaukee Badgers (1925). Prior to joining the NFL, Rydzewski played college football at Notre Dame under Knute Rockne. He earned All-American honors in 1917.