Cox was also a member of the Montreal Alouettes of the Interprovincial Rugby Football Union.
[2] Cox signed with the Chicago Rockets of the All-America Football Conference (AAFC) in 1946.
[3] He played in three games for the Rockets during the AAFC's first season in 1946, rushing once for 12 yards.
[4] In December 1947, Cox was selected by the Chicago Bears in the 31st round, with the 291st overall pick, of the 1948 NFL draft.
[3] Cox played in 11 games, starting three, for the Montreal Alouettes of the Interprovincial Rugby Football Union in 1948.