 He was an actor four years before he began playing college football and he was an all-conference offensive guard at UCLA.Named to the first All Star teams for both the Pacific-8 and the West Coast Athletic Conferences, Clark also received All Star All American Honourable Mention Laurels, played in the Hula Bowl and was selected by the Pittsburgh Steelers in the ninth round of the 1975 NFL Draft.While he did not appear in a National Football League game, he did play in the Canadian Football League for 20 games for the Toronto Argonauts (in 1977 and 1978).