 He initially played for Queen's Park, Third Lanark and Dundee during World War II, joined Rangers in 1946 and played in the Scottish Football League when it recommenced play after the war.Cox, a defender, made his league debut for Rangers in a 4–2 win over Motherwell at the start of the 1946–47 season.He made a total of 13 league appearances in his first season, including a 4–1 win over Hamilton Academical in the last match, as Rangers beat Hibernian to clinch the League title.