Born: November 22, 1927 | Died: June 14, 2003
Jimmy Knepper, a jazz trombonist best known for his productive but stormy association with Charles Mingus.
Over the course of a career that began when he was in his teens, Mr. Knepper was a featured soloist in countless bands, big and small. But his reputation as one of the most original trombonists of his generation rests largely on the music he made with Mingus from 1957 to 1962.
Mr. Knepper's distinctively gruff sound and loose-limbed phrasing were essential elements in some of the most celebrated albums by Mingus, the great bassist and composer, including ''The Clown,'' ''Tijuana Moods'' and ''Mingus Ah Um.''...