Åke Lassas played his entire career from 1948-63 with Leksands IF. He never won a Swedish title with them, but was a runner-up in 1959 and was awarded the inaugural Goldpucken award as the best player of the year at the Swedish Championships. Lassas was capped 81 times with the Swedish national team between 1948-59, scoring four goals. He won an Olympic bronze in 1952, won a World Championships silver in 1951, and bronze in 1954. He was also European Champion in 1951 and 1952, while taking silvers in 1949, 1954 and 1956 and bronze at the 1950 and 1955 European Championships. Lassas also played football and bandy at the Swedish Championships. He was awarded the Stora Grabbars Märke (Big Boys’ Badge) #41 in ice hockey, a Swedish sports honorary award created in 1928 by Bo Ekelund. After finishing his sporting career, Lassas worked as a coach with Mora IK, Orsa IF and Leksands IF.