Ferdinand Joseph LaMothe, known professionally as Jelly Roll Morton, was an American ragtime and jazz pianist, bandleader, and composer. Morton was jazz's first arranger, proving that a genre rooted in improvisation could retain its essential characteristics when notated.

Ferdinand Joseph LaMothe, known professionally as Jelly Roll Morton, was an American ragtime and jazz pianist, bandleader, and composer. Morton was jazz's first arranger, proving that a genre rooted in improvisation could retain its essential characteristics when notated.