Just Coolin’ is the result of a unique but short-lived ensemble of The Jazz Messengers collective. Originally founded and led by drummer Art Blakey, The Jazz Messengers knew many changes. “Stability can be elusive for even the most successful jazz ensembles,” author Bob Blumenthal wrote. In 1959, Hank Mobley, an alumnus of the band, replaced Benny Golson’s tenor saxophone in the band and he joined Lee Morgan (trumpet), Bobby Timmons (piano), Jymie Merritt (bass), and Art Blakey (drums) for a brief period.
The studio album was recorded on a single day in March 1959 at the famous Rudy Van Gelder studio in New Jersey. However, Blue Note Records co-founder Alfred Lion decided not to release the album and instead record a live performance at the famous Birdland club in New York. The live album titled At the Jazz Corner of the World was released in 1959 and remained the only issued recording of this jazz ensemble until Just Coolin’ was released in 2020.
Just Coolin’ features six songs including two unissued tracks: Quick Trick composed by Bobby Timmons (who also composed the jazz standard Moanin‘), and the uncredited composition Jimerick. Hank Mobley left the group already in July 1959 but, his contributions to the album were paramount. Half of the songs on the album are from his hand, including the almost nine minutes long title track, Just Coolin’.