Michael Spinks is an American former professional boxer who competed from 1977 to 1988. He held world championships in two weight classes, including the undisputed light heavyweight title and the lineal heavyweight title. Nicknamed "Jinx", which spawned the nickname of his straight right hand, "The Spinks Jinx", Spinks is the brother of former world heavyweight champion Leon Spinks. Michael Spinks has hand autographed this 8x10 Photo with Jinx inscription vs Larry Holmes. JSA Authentication Sticker with JSA Certificate of Authenticity.