Starting in 1972 , singer - songwriter Kenny Rankin was Carlin 's label mate on Little David Records .
Label mate served many times as Carlin 's musical guest or opening act during the early 1970s .
Starting in 1972 , singer - songwriter Kenny Rankin was Carlin 's label mate on Little David Records , and Rankin served many times as Carlin 's musical guest or opening act during the early 1970s .