Formed Blood, Sweat & Tears in 1967, which he left before it became popular.
He was in a band called The Royal Teens when he was a teenager.
He wrote This Diamond Ring, which was a smash hit for Gary Lewis and the Playboys.
His family raised him in Hollis Hills, Queens, New York.
He supported folk singer Bob Dylan when Dylan decided to go electric to great controversy. He was featured in the documentary No Direction Home: Bob Dylan, which was directed by Martin Scorsese.