After three years developing in the reserves, he made his debut on 8 March 1950, against Liverpool, scoring the only goal in a 1–0 win at Anfield. The following season he featured regularly as Blackpool challenged in the league and reached the 1951 FA Cup Final. Newcastle United proved too strong at Wembley, however, and two goals from Jackie Milburn took the trophy to the North-East. After the loss, Blackpool signed Ernie Taylor, and Mudie lost his place. Eventually, though, he worked his way back into the team.