Nat Adderley (November 25, 1931 – January 2, 2000) was an American jazz trumpeter.He was the younger brother of saxophonist Julian "Cannonball" Adderley, whom he remained very close to in his career, but under whose shadow he lived for most of his life. His "Work Song" is a jazz standard, and also became a success on the pop charts after singer Oscar Brown Jr. wrote lyrics for it.