The International Hotel and Casino in Las Vegas witnessed a seismic moment in heavyweight boxing on 6 December 1969, as Leotis Martin delivered a knockout victory over former world champion Sonny Liston. The bout, contested for the inaugural NABF heavyweight crown, ended at 1:08 of the ninth round, leaving Liston flat on the canvas and silencing those who had tipped him as a heavy favourite.

Liston, weighing in at 220 lbs to Martin’s 199 lbs, entered the ring on a 14-fight winning streak since his back-to-back defeats to Muhammad Ali. Thirteen of those victories had come by stoppage, and bookmakers had him a commanding 13–5 favourite. Ranked fifth by the WBA, Liston was expected to extend his resurgence against Martin, who was positioned two places above him at third.

The opening rounds unfolded in familiar fashion. Liston, with his long jab and powerful hook, pressed the action, while Martin circled, cautious of his opponent’s formidable strength. The fight’s early drama arrived in the fourth round, when a crisp left hook from Liston sent Martin to the floor. The Philadelphian rose swiftly, unshaken in spirit, and continued to weather the pressure. Ringside scorecards from press and judges alike had Liston well in front after eight rounds.

Yet boxing’s cruel theatre is often written in a single punch. In the ninth, Martin seized his chance. A thunderous right hand staggered Liston, and a follow-up barrage—a left hook and another right—ended matters. The former champion crashed face-first to the canvas and was counted out by referee Mike Kaplan. At ringside, medics worked quickly, with smelling salts eventually bringing Liston back to consciousness.

The official judges, Art Lurie (38–36), Mike Petrovich (37–34), and Ralph Mosa (38–35), all had Liston comfortably ahead before the stoppage. Unofficial tallies told a similar story, emphasising the dramatic turnaround. The purses reflected the stakes: Liston took home $25,000, Martin $10,000, but it was the latter who left with both the belt and the glory.

The night carried its ironies. Martin’s career-best triumph also proved his last appearance in the ring. A detached retina sustained during the contest forced him into retirement at the very moment he reached his pinnacle. For Liston, this penultimate bout marked the beginning of the end, his aura of menace punctured by a man once considered his sparring partner.

Howard Cosell’s ABC broadcast captured the moment for a national audience, while 1,000s in the showroom sat stunned. The clash, remembered for its sudden shift in fortunes, underlined boxing’s eternal truth: no matter the odds, one punch can rewrite history.

On that December night in Las Vegas, Leotis Martin carved his name into the heavyweight story with a knockout that will be remembered as one of the sport’s great upsets.