 The "Red Devils" then finished 14th in 1938–39.McKay's career was disrupted by the Second World War, putting at end to the Football League in the first half of the 1940s, though he did turn out for Manchester United in their wartime games.During the war he also made guest appearances for Stockport County and Port Vale, playing in Port Vale's 4–2 defeat by rivals Stoke City at The Old Recreation Ground.