Morgan recorded prolifically from 1956 until a day before his death in February 1972. He joined Dizzy Gillespie's Big Band at 18 and remained as a member for a year and a half until economic circumstances forced Gillespie to disband the unit in 1958. Morgan began recording for Blue Note in 1956, eventually recording 25 albums as a leader for the label. He also recorded on the Vee-Jay label and one album for Riverside Records on its short-lived Jazzland subsidiary. He was a featured sideman on several early Hank Mobley records, and intermittently thereafter. On John Coltrane's only Blue Note album as a leader, "Blue Train" (1957), he played a trumpet with an angled bell (given to him by Gillespie).