After the 1953–54 season Mosienko decided to retire from hockey, but the Black Hawks asked him to return for one more season, which he agreed to do. He played 64 games and had 27 points in the 1954–55 season, his last in the NHL. Feeling the Black Hawks lowballed him in regards to salary, Mosienko retired a second and final time from the NHL in 1955.
