Per allmusic.com

Limeliters,
accompanist with the Chad Mitchell Trio
Bobby Darin's group when the singer moved from pop to folk.
sessions for Hoyt Axton, Judy Collins & Tom & Jerry (Simon & Garfunkel)
solo dates around the Los Angeles area
the Jet Set with David Crosby and Gene Clark
      After a failed single under the name the Beefeaters, the group recruited bassist Chris Hillman and drummer Michael Clarke, changed their name to the Byrds

Couldn't keep a job, I guess.
:-)