Valentine began playing guitar as a teenager growing up in North Shields, Northumberland, the label said. After honing his skills playing with other groups, Valentine was recruited in 1963 to form The Animals, along with Eric Burdon, keys player Alan Price, bassist Chas Chandler and drummer John Steel.
Valentine stayed with The Animals for four years and would later join several reunions. He released a solo album in 1969. He played with a number of groups in recent years, during which time he lived in Connecticut.