Lyle Mays was an American jazz pianist, keyboardist, composer, and arranger. Best known for his long-standing collaboration with guitarist Pat Metheny, Mays was a pivotal figure in contemporary jazz. His innovative harmonic language, intricate compositions, and seamless blend of acoustic and electronic textures defined the sound of the Pat Metheny Group. Mays' arrangements were characterized by their sophisticated voicings, lyrical melodies, and expansive forms, contributing significantly to the evolution of jazz fusion and modern instrumental music.