By the late 1960s, he was appearing on “Dragnet,” “Lassie,” “Bonanza” and the prime-time soap opera “The Survivors,” among other TV shows. He won a supporting part in the John Wayne western “The Undefeated” (1969), then a co-starring role opposite Mitchum in “Going Home” (1971), as a troubled young man. Vincent later appeared in Disney’s “The World’s Greatest Athlete” (1973), opposite Tim Conway, and “Big Wednesday” (1978), a drama about surfers facing the prospect of going to fight in Vietnam. Increasingly too drunk to remember his lines, he ended his career in D-grade fare such as “Rave Nerve” (1991), featuring former porn actress Traci Lords, and “White Boy” (2002), a gang-warfare story. His marriages to Bonnie Poorman and Joanne Robinson ended in divorce. For years, he was estranged from his only child, Amber, a daughter from his first marriage. He had a home in Mississippi with his third wife, the former Patricia Christ. A complete list of survivors could not be immediately confirmed. When interviewed a few years ago by an Australian TV reporter, Vincent said he struggled to recall much of anything about his career or the accidents that may have contributed to his failing memory.
