Mason was a wartime guest player for Exeter City during 1944/45 when, as the situation eased, a number of games were organised to constitute the first football played by the club since 1939. 

 A guest player for Exeter City in 1944-45, Mason, who was on the books at Blackpool and in the Royal Navy, made his debut for the Grecians in a 5-1 home win against Plymouth Argyle in April 1945.