Few, if any, free jazz saxophonists have approached music with the same degree of intellectual rigor as Sam Rivers; just as few have managed to maintain a high level of creativity over a long life. Rivers plays with remarkable technical precision and a manifest knowledge of his materials. His sound is hard and extraordinarily well-centered, his articulation sharp, and his command of the tenor saxophone complete. Rivers' playing sometimes has an unremitting seriousness that can be extremely demanding, even off-putting. Nevertheless, the depth of his artistry is considerable. Rivers is as substantial a player as avant-garde jazz has produced.
Rivers' father was a church musician, touring with a gospel quartet.