to 1960, the second from 1962 to 1969. He recorded as a leader for Mercury (1947-1949), Aristocrat (1948-1950), Chess (1950-1951), Prestige (1950-1952), Decca (1952), and United (1952-1953). For the rest of his career, he was affiliated with Prestige. Ammons and Von Freeman were the founders of the Chicago School of tenor