Foreman was a headliner most of his career. Being a big, aggressive, hard punching Olympic gold medalist with a knack for winning in big fashion will do that for you. It was unusual for him to be the undercard after the very start of his career. He was on the undercard of Cleveland Williams-Mac Foster though in the late 60s
Foreman fought on undercards FRAZIER-QUARRY, Frazier-Ellis Title Fight, Andy Kendall-Larry Buck, Henry Clark-Jeff Merritt, Lionel Rose-Raul Cruz. Did not take George long to be the head liner as most boxing stars, winning they olympics might have helped.