On 17 March 1977, the Roberto Clemente Coliseum in San Juan, Puerto Rico, witnessed a clash of heavyweight contenders that shook the division. George Foreman, weighing in at 229 lbs and ranked number one in the world, faced off against Philadelphia’s Jimmy Young, the crafty third-ranked challenger who tipped the scales at 213 lbs.

Originally scheduled for Maryland, the bout was moved to Puerto Rico by promoter Don King. The tropical climate soon became as significant an opponent as Young himself, with Foreman visibly battling the sweltering heat as much as his rival.

From the opening rounds, Foreman pressed forward with his trademark aggression, but Young’s movement and defensive craft blunted much of the attack. Growing frustrated, Foreman resorted to roughhouse tactics – shoving, hitting on the break, even wrenching Young’s arm during a clinch. Referee Waldemar Schmidt deducted a point from Foreman in the third, a decision that foreshadowed the turbulent evening ahead.

The turning point nearly came in the seventh. A thunderous left hook from Foreman rocked Young to the core. Stumbling back into the ropes, Young appeared dazed and vulnerable as Foreman chased a finish. Yet Foreman, already draining in the Puerto Rican heat, lacked the energy to deliver the decisive blow. Young steadied himself, flicked out sharp jabs, and survived the storm.

That reprieve changed the rhythm of the fight. As Foreman’s power ebbed, Young’s confidence grew. The Philadelphian circled, countered, and picked his moments, edging ahead on two of the judges’ cards by the time the final round arrived.

Round twelve sealed the verdict and the fight’s place in boxing history. Foreman lunged with a wild right, only to be met by a crisp counter overhand from Young. The punch dropped Foreman to one knee – only the third time in his career he had been floored. Though he rose quickly and absorbed the referee’s count, Foreman spent the closing seconds clinging on as Young fired in flurries.

After twelve exhausting rounds, the scorecards read 118–111, 116–112, and 115–114, a unanimous decision for Jimmy Young. The contest was later honoured as The Ring magazine’s Fight of the Year, with its dramatic twelfth round also crowned Round of the Year.

Foreman, drained and hallucinating from heat exhaustion, collapsed in his dressing room afterwards, later claiming a life-changing religious experience. Within two months, he announced his retirement, stepping away from the sport for a decade before his celebrated comeback.

For Young, the victory cemented his reputation as one of the most skilful heavyweights of the 1970s, though a title shot would still elude him. For Foreman, the defeat marked the end of one era and the beginning of another.