"JLJ Blues" is an original jazz blues composition by organist Joey DeFrancesco, first recorded for the 2012 album Wonderful! Wonderful! on HighNote Records. The title references the initials of the three musicians on the session: Joey DeFrancesco, Larry Coryell, and Jimmy Cobb, whose collaboration was captured at Rudy Van Gelder's legendary studio in Englewood Cliffs, New Jersey. The composition is built on a straightforward blues form that serves as a platform for extended improvisation, featuring soulful, wailing organ lines over a supportive rhythmic foundation. It reflects DeFrancesco's deep roots in the Hammond B3 organ tradition, where blues-drenched melodic and harmonic ideas form the backbone of the style he inherited from predecessors like Jimmy Smith and Jack McDuff. The piece is designed to facilitate interactive blowing among the trio members, with the blues framework allowing each player to stretch out in exchanges that reviewers described as ranging from sublime to pyrotechnic. As one of several DeFrancesco originals on the album, "JLJ Blues" represents the kind of blues vehicle that has been a recurring element throughout his prolific recording career since his debut album All of Me in 1989. The tune remains a deep cut associated primarily with this particular recording rather than a widely covered standard in the broader jazz repertoire.