Artist Biography Available in: Roscoe Mitchell (born August 3, 1940) is an American composer, jazz instrumentalist, and educator, known for being "a technically superb – if idiosyncratic – saxophonist". The Penguin Guide to Jazz described him as "one of the key figures" in avant-garde jazz; All About Jazz stated in 2004 that he had been "at the forefront of modern music" for more than 35 years.