He played junior for the Port Arthur Flyers from 1942 to 1946, then turned pro with the New York Rovers in 1946-47. After two more years in the minor pros, he was traded by the New York Rangers to the Chicago Black Hawks in 1950. Hrymnak played 18 games for Chicago in 1951-52, scoring 2 goals and an assist. He played two playoff games for the Detroit Red Wings in 1952-53. That was the extent of his NHL experience. He played in the minor pros through the 1957-58 season. After sitting out one season, he played for the senior Port Arthur Bearcats until 1965.