Είχε συνεργασθεί με Sonny Rollins, Don Cherry, Billy Higgins, Cecil Taylor. McCoy Tyner, Albert Ayler, Sonny Rollins, Don Cherry, Billy Higgins, and Cecil Taylor. In the '60s, he began to delve into the avant-garde, playing alongisde the late McCoy Tyner, Albert Ayler. Πέθανε από επιπλοκές του κορωνοϊού, ήταν 84.
As leader
1965: The Call (ESP-Disk)
2005: Live at the Kerava Jazz Festival (Ayler Records)
2008: Going to the Ritual (with Rashied Ali, Porter Records)
2008: Profound Sound Trio: Opus de Life (with Paul Dunmall and Andrew Cyrille, Porter Records)
2009: Solo (ILK Music)
2010: Spirits Aloft (with Rashied Ali, Porter Records)
2014: The Tone of Wonder (solo, doublebass and violin, Uncool Edition)
As sideman
with Mose Allison
I Love the Life I Live (Columbia, 1960)
with Albert Ayler
Spirits (Debut, 1964)
Swing Low Sweet Spiritual (Osmosis, 1965 [1971])
Spirits Rejoice (ESP, 1965)
Live Greenwich Village Sessions (Impulse!)
With Bill Barron
West Side Story Bossa Nova (Dauntless, 1963)
with Roy Burns
Skin Burns (Roulette)
with Don Cherry
Complete Communion (Blue Note)
Symphony for Improvisers (Blue Note)
Where Is Brooklyn? (Blue Note)
with Andrew Cyrille and Paul Dunmall - Profound Sound Trio
Opus De Life (Porter Records)
with Walt Dickerson
Jazz Impressions of Lawrence of Arabia (Dauntless, 1963)
with Shafi Hadi
Debut Rarities, vol. 3 (recorded in 1957, NYC, by the Shafi Hadi Sextet;[7] released as Original Jazz Classics CD OJCCD-1821-2 in 1993)
with Roy Haynes
Out of the Afternoon (Impulse!)
with Lee Konitz
Tranquility (Verve, 1957)
with Rolf Kühn
Be My Guest (Panorama)
with Carmen Leggio
The Carmen Leggio Group (Jazz Unlimited)
With Gerry Mulligan
The Gerry Mulligan Songbook (World Pacific, 1957)
Reunion with Chet Baker (World Pacific, 1957) - with Chet Baker
Annie Ross Sings a Song with Mulligan! (World Pacific, 1957) - with Annie Ross
with William Parker
Requiem (Splasc(H), 2006) - with Charles Gayle
with Marc Ribot
Spiritual Unity (Pi Recordings, 2005)
Live at the Village Vanguard (Pi, 2014)
with Sonny Rollins
Brass & Trio (1958)
Sonny Meets Hawk! (1963)
with Pharoah Sanders
Tauhid (Impulse! 1967)
with Shirley Scott
Shirley Scott Plays Horace Silver (Prestige)
with Archie Shepp
Further Fire Music (Impulse!)
On This Night (Impulse!)
with Billy Taylor
Uptown (Riverside, 1960)
Warming Up! (Riverside, 1960)
with Cecil Taylor
Into the Hot (Impulse! – issued under Gil Evans's name)
Conquistador! (Blue Note)
Unit Structures (Blue Note)
with Lennie Tristano
Continuity (Jazz Records)
with McCoy Tyner
Reaching Fourth (Impulse!)
