In 1990, Leon's other son, Leon Calvin, was shot to death in East St. Louis as he was driving home from his girlfriend's house. Calvin was an aspiring light heavyweight pro boxer with a record of 2–0, with the two pro bouts occurring only a month before he died. Leon's grandson and Calvin's son, Leon Spinks III, is an aspiring light heavyweight southpaw boxer with a pro record of 11–3–1 with seven knockouts, his last outing being a six-round draw with Robbie Cannon in October 2017.
