He would put in a full day's practice on both
drums and piano in his formative years. Member of the
Charles Lloyd Quartet alongside longtime collaborator
Keith Jarrett (he's now in Jarrett's trio, 30 years after their Lloyd days). The first
Special Edition LP was a Big Deal in its day - part of a "Cultural Revolution" of the avant-garde in which Jack was "Our Mole at
ECM"; he was later the drummer for the
Ornette Coleman/
Pat Metheny summit
Song X. A voluminous discography.