15 Fun Facts
🎲
Sport

Boxing, MMA and Combat Sports

Sixteen articles on combat sports: boxing greats from Rocky Marciano and Muhammad Ali to Mike Tyson, Mayweather and Pacquiao, MMA stars Conor McGregor, Khabib and Ronda Rousey, sumo, and wrestling icons André the Giant and John Cena.

Updated November 3, 2026 · 16 items · 240 facts in the linked articles · Reading time 5 min

Combat sports are among the oldest contests in human history, from ancient Olympic boxing and Greek pankration to sumo's Shinto rituals. This collection follows them into the modern era with the great boxers Rocky Marciano, Muhammad Ali, Mike Tyson, Oscar De La Hoya, Floyd Mayweather, Manny Pacquiao, Vitali Klitschko and Conor Benn; the mixed martial arts stars Conor McGregor, Khabib Nurmagomedov and Ronda Rousey; and the wrestling giants André the Giant and John Cena. Further articles explain boxing, MMA and sumo themselves.

The records speak for themselves. Rocky Marciano retired undefeated at 49-0, Mayweather went one better at 50-0 and became the first boxer to earn $1 billion, Khabib retired with a perfect 29-0 MMA record, and Pacquiao is boxing's only eight-division world champion. Mike Tyson became the youngest heavyweight champion at 20, and Klitschko was never knocked down in 47 professional fights.

Their lives outside the ring are just as remarkable. Ali started boxing after his bicycle was stolen and later negotiated the release of hostages in Iraq, Tyson kept Bengal tigers and threw his first punch to defend his pigeons, Klitschko became mayor of Kyiv, and Pacquiao played professional basketball while he was world champion and later ran for president of the Philippines. André the Giant was driven to school by the playwright Samuel Beckett.

From the shortest world-title fight, just 11 seconds, to John Cena's record of more than 650 granted Make-A-Wish requests, the stories below are full of surprises. Choose a fighter or sport to read fifteen facts.

The short version

Every item on this page, with the one fact most people get wrong about it.

Name Where you'll meet it The fact worth knowing
Muhammad Ali USA, heavyweight champion He started boxing after someone stole his bicycle.
Mike Tyson USA, heavyweight champion He became the youngest heavyweight champion at just 20.
Floyd Mayweather USA, 50-0 He was the first boxer to earn more than $1 billion.
Manny Pacquiao Philippines, 8-division champion He is boxing's only eight-division world champion.
Rocky Marciano USA, 49-0 He is the only heavyweight champion to retire undefeated.
Oscar De La Hoya USA, 6-division champion He won Olympic gold to keep a promise to his dying mother.
Vitali Klitschko Ukraine, heavyweight champion He was never knocked down in 47 professional fights.
Conor Benn Great Britain, welterweight His father, Nigel Benn, initially discouraged him from boxing.
Boxing Ancient Olympics to today The shortest world-title fight lasted just 11 seconds.
Conor McGregor Ireland, UFC champion He knocked out José Aldo in the fastest UFC title knockout ever.
Khabib Nurmagomedov Russia (Dagestan), UFC champion He retired with a perfect 29-0 record.
Ronda Rousey USA, UFC and WWE champion She changed Dana White's mind about women fighting in the UFC.
Mixed Martial Arts Modern sport since 1993 Early events had almost no rules, weight classes or time limits.
Sumo Wrestling Japan Referees traditionally carry a dagger for ritual suicide.
André the Giant France, professional wrestling The playwright Samuel Beckett drove him to school.
John Cena USA, WWE champion He has granted more than 650 Make-A-Wish requests, a world record.

Record holders

Perfect Record

50-0

Floyd Mayweather retired undefeated and became the first boxer to earn more than $1 billion. Floyd Mayweather

Most Weight Divisions

8

Manny Pacquiao is boxing's only world champion in eight weight divisions. Manny Pacquiao

Shortest Title Fight

11 seconds

Gerald McClellan defended his WBC title against Jay Bell in just 11 seconds in 1993. Boxing

Most Wishes Granted

650+

John Cena holds the Guinness record for granting more Make-A-Wish requests than anyone in history. John Cena

All 16, one fact at a time

The Undisputed Legend: 15 Fascinating Facts About Muhammad Ali

Muhammad Ali

USA, heavyweight champion

Muhammad Ali renounced his birth name, sacrificed his prime years to protest the Vietnam War and invented the rope-a-dope against George Foreman. He released a Grammy-nominated album, starred in a Broadway musical and defeated Superman in a 1978 comic. He later travelled to Iraq to secure the release of American hostages.

Read the full article →
The Fiercest Heavyweight: 15 Fascinating Facts About Mike Tyson

Mike Tyson

USA, heavyweight champion

Mike Tyson's first fight came after a bully killed his pigeon, and he once kept three Bengal tigers. He could not beat his own character in Punch-Out!! and lost 100 pounds on a vegan diet. At 58 he returned to the ring to fight Jake Paul.

Read the full article →
The Undefeated Icon: 15 Fascinating Facts About Floyd Mayweather

Floyd Mayweather

USA, 50-0

"Pretty Boy" Floyd got his nickname from his unmarked face and retired with a perfect 50-0 record. He fought with mouthguards worth up to $25,000, trains at 3 am and fuelled his camps with gummy bears. He even founded a NASCAR team.

Read the full article →
The Octuple Champion: 15 Fascinating Facts About Manny Pacquiao

Manny Pacquiao

Philippines, 8-division champion

Manny Pacquiao ran away from home as a teenager and worked as a baker before boxing. He played pro basketball while world champion, recorded a Billboard-charting song and served as a senator. He holds the rank of full colonel in the Philippine military.

Read the full article →
The Undefeated Heavyweight: 15 Fascinating Facts About Rocky Marciano

Rocky Marciano

USA, 49-0

Rocky Marciano took up boxing to avoid army kitchen duty and had the shortest reach of any heavyweight champion. He trained with a 300-pound bag and shadowboxed underwater, and his punch was measured against armour-piercing ammunition. He hid fortunes in furniture and curtain rods.

Read the full article →
The Golden Boy: 15 Fascinating Facts About Oscar De La Hoya

Oscar De La Hoya

USA, 6-division champion

The Golden Boy comes from three generations of boxers and won world titles in six weight divisions. He earned a Latin Grammy nomination as a singer and built a promotion empire. A statue of him stands outside the Crypto.com Arena in Los Angeles.

Read the full article →
The Ironclad Heavyweight: 15 Fascinating Facts About Vitali Klitschko

Vitali Klitschko

Ukraine, heavyweight champion

"Dr. Ironfist" earned a PhD and was a six-time kickboxing world champion before boxing. He promised his mother never to fight his brother Wladimir and has served as mayor of Kyiv since 2014. In 2022 he took up arms to defend the city.

Read the full article →
The Modern Destroyer: 15 Fascinating Facts About Conor Benn

Conor Benn

Great Britain, welterweight

Conor Benn grew up in luxury in Spain and did not plan to box at first. He made an explosive debut at London's O2 Arena and earned the nickname "The Destroyer". His planned fight with Chris Eubank Jr. revived a famous family rivalry.

Read the full article →
The Sweet Science: 15 Fascinating Facts About Boxing

Boxing

Ancient Olympics to today

Ancient Olympic boxing had no weight classes or time limits, and modern rules come from an 1867 code. Heavyweight punches land with more than 1,000 pounds of force, generated mainly from the legs. Chuck Wepner's underdog fight inspired the film Rocky.

Read the full article →
The Notorious Fighter: 15 Fascinating Facts About Conor McGregor

Conor McGregor

Ireland, UFC champion

Conor McGregor was a plumber's apprentice collecting welfare days before his UFC debut and became the first fighter to hold two UFC titles at once. He sold his whiskey brand for up to $600 million and earned over $100 million fighting Floyd Mayweather. Sinéad O'Connor once sang him to the octagon.

Read the full article →
The Undefeated Eagle: 15 Fascinating Facts About Khabib Nurmagomedov

Khabib Nurmagomedov

Russia (Dagestan), UFC champion

Khabib wrestled a chained bear cub at nine and wears the papakha hat of his Avar heritage. He kept a promise to his mother to retire after his father's death, despite offers worth $100 million. He studied economics and now coaches champions.

Read the full article →
The Unstoppable Pioneer: 15 Fascinating Facts About Ronda Rousey

Ronda Rousey

USA, UFC and WWE champion

Ronda Rousey overcame childhood speech apraxia and became the first American woman to win an Olympic judo medal. She once lived in her car and moderated Pokémon forums. She won many fights in under a minute and became a champion in both the UFC and WWE.

Read the full article →
The Brutal Evolution: 15 Fascinating Facts About Mixed Martial Arts

Mixed Martial Arts

Modern sport since 1993

Royce Gracie won UFC 1, and padded gloves only became mandatory in 1997. The octagon was inspired by action films and is considered safer than a boxing ring. MMA traces its roots back to ancient Greek pankration.

Read the full article →
The Sacred Heavyweights: 15 Fascinating Facts About Sumo Wrestling

Sumo Wrestling

Japan

Sumo wrestlers eat chanko nabe, take mandatory naps after meals and are forbidden from driving. Tons of salt are thrown to ward off evil spirits, and the silk belts are never washed. Fewer than 80 men have ever reached the supreme rank.

Read the full article →
The Gentle Giant: 15 Fascinating Facts About André the Giant

André the Giant

France, professional wrestling

André the Giant stood over seven feet tall, never lifted weights and refused treatment for acromegaly. Silver dollars could pass through his rings, and he endured severe pain filming The Princess Bride. WWE created its Hall of Fame specifically for him.

Read the full article →
The Unstoppable Champ: 15 Fascinating Facts About John Cena

John Cena

USA, WWE champion

John Cena once lived in his car, learned Mandarin to help WWE expand into China and recorded a platinum rap album. His original persona was a half-robot called "The Prototype". He voiced the bull in Ferdinand and is a proud member of the BTS ARMY.

Read the full article →

Quiz: how much of that stuck?

8 questions, every answer is somewhere above.

Boxing, MMA and Combat Sports 0 / 8

1. What made Muhammad Ali start boxing?

2. What animals did Mike Tyson keep at his mansion?

3. How many weight divisions has Manny Pacquiao won world titles in?

4. What was Rocky Marciano's professional record?

5. Which city does Vitali Klitschko serve as mayor?

6. What did Khabib Nurmagomedov wrestle at the age of nine?

7. Who drove André the Giant to school as a boy?

8. Which animated bull did John Cena voice?

Frequently asked

Who is the greatest boxer of all time?

Muhammad Ali is the name most often given, for his skill, charisma and stand against the Vietnam War. Rocky Marciano and Floyd Mayweather both retired undefeated, and Sugar Ray Robinson inspired the very idea of ranking boxers "pound for pound".

Is MMA more dangerous than boxing?

Not necessarily. MMA fights end in many ways besides knockouts, and the enclosed octagon is considered safer than a boxing ring. In boxing, gloves mainly protect the puncher's hands, allowing more blows to the head.

How did MMA begin?

Early events were almost rule-free contests to find out which martial art was best, with no weight classes or time limits. Royce Gracie won UFC 1, and padded gloves were not mandatory until 1997. MMA traces its roots back to ancient Greek pankration.

Why don't sumo wrestlers drive?

Active sumo wrestlers are strictly forbidden from driving cars, partly for safety. Their lives are governed by centuries-old rules, from their wax-styled topknots to mandatory naps after meals to help them gain weight.

Who was the first woman in the UFC?

Ronda Rousey. Dana White had promised women would never fight in the UFC, but Rousey changed his mind, became the first female fighter signed and later became a champion in both the UFC and WWE.

Keep going

Enjoyed these facts? There's more! 💌

Fresh fun facts in your inbox. No spam, ever.