Patrick Philippe Moraz (born June 24, 1948 in Villars-Ste-Croix, Morges, Switzerland) is a progressive rock keyboard player. He is best known as the keyboardist for progressive rock legends Yes, from 1974-1976, and the Moody Blues from 1978 - 1991. He was classically trained at the Conservatory of Lausanne, but played jazz primarily before entering progressive rock and has been highly acclaimed for his virtuosity.