Career
He died in an automobile accident in New York in 1965. After working with Elliot Lawrence, Claude Thornhill, and Sam Donahue, Dennis also performed with Charles Mingus, appearing on two of Mingus"s more successful albums in 1959, Blues & Roots and Mingus Ah Um. In 1953, Dennis recorded Four Trombones (released in 1957) for Mingus"s Debut Records.
The other three trombones were J. J. The fullest recorded example of Dennis"s solo work, however, is on a little-known 1956 Savoy disc by English pianist Ronnie Ball (like Dennis, a student of Tristano), All About Ronnie, in the company of Ted Brown, Wendell Marshall and Kenny Clarke.
In the late 1950s Dennis returned to his big band roots, joining Buddy Rich in 1959 after stints with Benny Goodman, (with whom he travelled to the Soviet Union in 1962) and Woody Herman.
In the 1960s, Dennis also performed often with Gerry Mulligan. Style and influence Dennis was renowned for his extremely fast articulation on the trombone, obtained by means of varying the natural harmonics of the instrument with minimal recourse to the slide (a technique known as "against the grain").
