Biggest Punchers & KO Leaders

Pulled live from the divisional data. Switch between knockout rate and total knockouts, and filter by weight.

#FighterDivisionRecordKO%

KO% rewards finishers but flatters fighters with short records — tick "10+ fight record" to filter those out. Records are snapshots; regenerate the data when the landscape updates.

Records & Milestones

Record breakers
Youngest world champion — Wilfred Benítez
Beat the great Antonio Cervantes for the WBA light-welterweight title in 1976, aged 17 — a record that has never been broken. ▶ Watch · Read
17
Youngest heavyweight champion — Mike Tyson
Stopped Trevor Berbick in two rounds in 1986 to take the WBC title at 20 years old. ▶ Watch · Read
20
Oldest world champion — Bernard Hopkins
Won a major world title at 46, then extended his own record to 49 years 94 days by unifying at light-heavyweight in 2014 — passing George Foreman (45). ▶ Watch · Read
49
Fastest world-title KO — Zolani Tete
Flattened Siboniso Gonya with his first punch to retain the WBO bantamweight title in Belfast, 2017 — the quickest finish in world-title history. ▶ Watch · Read
11 sec
Fewest fights to a world title — Muangsurin & Lomachenko
Saensak Muangsurin (1975) and Vasyl Lomachenko (2014) both won a world title in only their third professional fight. ▶ Watch · Read
3
Most professional fights — Len Wickwar
The Leicester lightweight fought around 470 times between 1928 and 1947 — the most verified pro bouts in history, often several in a night. Read
~470
Perfect knockout record — Edwin Valero
Won all 27 of his professional fights by knockout — a 100% KO ratio, and two world titles. ▶ Watch · Read
100%
Retired undefeated heavyweight — Rocky Marciano
The only heavyweight champion to retire without a defeat — 49 wins, 43 by knockout. ▶ Watch · Read
49-0
Most wins undefeated at retirement — Floyd Mayweather
Walked away 50-0, surpassing Marciano's mark for a world champion retiring unbeaten. ▶ Watch · Read
50-0
Records are widely reported and, where noted, Guinness-verified (youngest champion, fastest title KO, fewest fights to a title). Career totals for very early fighters such as Wickwar are best available estimates.
Biggest live attendances
Julio César Chávez v Greg Haugen
Estadio Azteca, Mexico City · 1993 · the largest paid attendance in boxing history
132,274
Anthony Joshua v Wladimir Klitschko
Wembley Stadium, London · 2017 · a post-war British record
~90,000
Biggest pay-per-view events
Mayweather v Pacquiao
2015 · the all-time PPV buy-rate record
~4.6M buys
Mayweather v McGregor
2017 · over $600M total revenue
4.3M buys
Mayweather v De La Hoya
2007
2.48M buys
Boxing around the world
A truly global sport with deep heartlands: Mexico (where Chávez drew 132,000), the USA and UK, the Philippines (a nation that stops for Pacquiao), Japan (a powerhouse at the lower weights), Kazakhstan, and the amateur strongholds of Cuba and Eastern Europe. Wherever you go, the sport has its own local heroes — which is what the Local & Live page is about.
Figures are widely reported records; revenue numbers vary by source depending on what's counted. Chávez–Haugen attendance and the Mayweather PPV buy-rates are well-documented.