Floyd Mayweather Jr. retired with a perfect 50-0 record and earned over $1 billion in career prize money, making him the sport's highest earner ever. This 50-question quiz dives deep into boxing's 17 weight classes, the four major sanctioning bodies (WBC, WBA, IBF, WBO), the landmark fights that defined eras — from Ali vs. Frazier to the Rumble in the Jungle — and the champions who shaped the sport from Joe Louis and Rocky Marciano through Mike Tyson to Oleksandr Usyk's undisputed heavyweight conquest in 2024.
From the marquee lights of Madison Square Garden to the heat of the Thrilla in Manila, boxing has produced some of sport's most enduring moments. This quiz spans the full breadth of the sweet science — rules, weight classes, sanctioning bodies, legendary fighters, and the defining bouts that shaped history.
Each round presents 10 randomized multiple-choice questions drawn from a pool of 50, so every playthrough is different. You get instant feedback with explanations after each answer, plus a shareable score at the end.
You'll explore all 17 professional weight classes, the history and belt colours of the four major sanctioning bodies, Ali's rope-a-dope strategy, the Bite Fight, Mayweather's undefeated reign, Manny Pacquiao's record eight-division championship, Rocky Marciano's perfect record, and the rise of modern undisputed champions Usyk and Canelo.
Muhammad Ali is most widely regarded as the greatest, finishing 56-5 with 37 knockouts and winning the heavyweight title three times. Sugar Ray Robinson is often cited by historians as the pound-for-pound greatest, with a 173-19-6 record and five middleweight title reigns.
Professional boxing recognises 17 weight classes, from Minimumweight (105 lbs) up to Heavyweight (200 lbs and above). The most prestigious divisions historically are Heavyweight, Middleweight (160 lbs), Welterweight (147 lbs), and Lightweight (135 lbs).
An undisputed champion holds all four major belts (WBC, WBA, IBF, WBO) simultaneously in a weight class. In 2024, Oleksandr Usyk became undisputed heavyweight champion by defeating Tyson Fury — the first undisputed heavyweight since Lennox Lewis in 1999.
Last updated: March 2026