Aside from a brief stint with Rosenlewin Urheilijat -38, Stig-Göran Myntti spent the entirety of his football career, from 1943 through 1965, with Vasa IFK, making nearly 300 appearances with the team. During that time, he won the Mestaruussarja, the Finnish top league, three times (1944, 1946, and 1953) and was its top scorer in 1948. Between 1945 and 1958 he earned 61 international caps, with his most notable tournament being the 1952 Helsinki Olympics. There, Finland lost its match against Austria in round one and was eliminated from the tournament. Myntti also played 12 games with the Finnish national bandy team, and was runner-up behind the Soviet Union at the 1957 World Championships. He was made a member of the Finnish Football Hall of Fame in 1993. His son Kenth and grandson Henri were also professional footballers.