was an American jazz saxophonist, clarinetist, pianist, composer and arranger.[7] Though primarily known as one of the leading jazz baritone saxophonists—playing the instrument with a light and airy tone in the era of cool jazz—Mulligan was also a significant arranger working with Claude Thornhill, Miles Davis, Stan Kenton, and others. His piano-less quartet of the early 1950s with trumpeter Chet Baker is still regarded as one of the best cool jazz ensembles. Mulligan was also a skilled pianist and played several other reed instruments. Several of his compositions, including "Walkin' Shoes" and "Five Brothers", have become standards.