Mayweather, Calzaghe, Adams: 21 boxers who retired undefeated champions

Undefeated boxing champions

Boxing is a sport that has provided entertainment to the world for centuries.

Over the many years, it has produced countless legendary fighters who have gone down in history for their magnificent achievements.

But since the first world championship was won, only 21 fighters have retired undefeated with their belts around their waists.

Here’s every single professional boxing world champion who hung up their gloves without a single loss on their record.

Michele Aboro

A key figure in changing the landscape of women’s boxing. Michele Aboro retired as the undefeated WIBF super-bantamweight champion in 2001.

Nicola Adams

After becoming the first ever female Olympic boxing champion, Nicola Adams turned professional and won the WBO flyweight title. She was forced to retire in 2019 due to the risk of permanent vision loss.

MANCHESTER, ENGLAND – APRIL 08: Nicola Adams OBE celebrates after her victory over Virginia Noemi Carcamo during their International Flyweight Contest at Manchester Arena on April 8, 2017 in Manchester, England. (Photo by Mark Robinson/Getty Images)

Laila Ali

The daughter of Muhammad Ali retired as the WBC, WIBA, IWBF and IBA female super middleweight champion and IWBF light heavyweight champion.

Laila also marked her name in history by fighting Joe Frazier’s daughter Jacqui in the first female main-event pay-per-view match.

Jimmy Barry

Jimmy Barry held the world bantamweight championship from 1894 to 1899 and was undefeated in 70 professional bouts.

Joe Calzaghe

The Pride of Wales held world championships in two weight classes and remains the longest reigning super-middleweight world champion in boxing history.

Calzaghe held the WBO belt for more than 10 years and defended it on 20 occasions, a division record shared with Sven Ottke.

CARDIFF, WALES – JUNE 28: Joe Calzaghe of Wales celebrates his win after two rounds of the super middleweight contest between Joe Calzaghe of Wales and Byron Mitchell of USA on June 28, 2003 at Cardiff International Arena in Cardiff, Wales. (Photo by John Gichigi/Getty Images)

Kim Ji-won

Kim Ji-won retired in 1986 as the undefeated super bantamweight champion. The South Korean fighter hung up his gloves in order to pursue a career in theatrical acting and singing.

Mihai Leu

Romanian fighter Mihai Leu was forced to step away from the ring in 1997 due to injury. He retired as the WBO welterweight champion and became a rally driver.

Ricardo López

Ricardo López held the WBC mini flyweight title for eight years and defended it against a record 21 opponents. He also held the WBA and WBO titles until 1998 and retired as the  IBF junior flyweight champion.

9 Nov 1996: Ricardo Lopez (left) throws a punch at Morgan Nduma during a bout at the MGM Grand Hotel in Las Vegas, Nevada. Lopez won the fight with a TKO in the sixth round. Mandatory Credit: Al Bello /Allsport

Rocky Marciano

Rocky Marciano was the world heavyweight champion from 1952 to 1956 and is the only heavyweight title holder to retire undefeated.

Terry Marsh

Terry Marsh became the British, European and IBF light welterweight world champion during the 1980s.

Following his announcement that he had epilepsy, the Englishman became just the second European fighter to retire as an undefeated world champion.

Floyd Mayweather Jr

The biggest pay-per-view star of any sport enjoyed a gargantuan career and has since dipped in and out of retirement.

In 2008, Mayweather retired as the WBC welterweight champion but returned to the ring 21 months later. In 2015, Money defended his WBC, WBA and The Ring titles before retiring for the second time.

LAS VEGAS, NV – MAY 05: Floyd Mayweather Jr. celebrates after defeating Miguel Cotto by unanimous decision during their WBA super welterweight title fight at the MGM Grand Garden Arena on May 5, 2012 in Las Vegas, Nevada. (Photo by Al Bello/Getty Images)

Jack McAuliffe

After becoming the first man to hold the world lightweight championship 1886 to 1893, Jack McAuliffe became the first European boxer in history to retire as an undefeated world champion.

Sven Ottke

Sven Ottke shares the record of defending his super-middleweight title against 20 opponents with Calzaghe. The German retired as undefeated world champion in 2004.

Dmitry Pirog

Now a politician, Dmitry Pirog once competed inside the ring and held the WBO middleweight title from 2010 to 2012.

He kept hold of his title until retirement, when a spinal injury forced him out of the sport.

Natascha Ragosina

Natascha Ragosina spent most of her professional career as the top female super middleweight boxer in the world.

She is the longest reigning WBA and WBC super middleweight champion and retired holding all super middleweight titles and two heavyweight belts.

Boxing – Natascha Ragosina vs Sarka Stoklaskova – Volkswagenhalle, Braunschweig, Germany – 7/5/05 Natascha Ragosina (L) in action v Sarka Stoklaskova (R) Mandatory Credit: Action Images / Andrew Couldridge

Kara Ro

As an all-round athlete, Kara Ro was awarded MVP in basketball, volleyball, co-ed volleyball, and track and field. She retired from boxing as the undefeated WIBA lightweight champion.

Harry Simon

Harry Simon held a world title across two weights during his career and retired in 2002 as the WBO middleweight champion following a serious car crash.

The incident eventually saw him sentenced to prison for culpable homicide.

Pichit Sitbangprachan

Pichit Sitbangprachan retired with a 24-0 record after winning the IBF flyweight title. He was viewed as an icon during the 1990s as Thailand did not have any boxing champions during that time.

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Muhammad Ali

Where was Muhammad Ali born?

Edwin Valero

(Trigger warning, suicide)

The Venezuelan boxer enjoyed an impressive career and held two titles in two different weight classes. Valero is the only WBC champion in history to win all his fights via knockout.

In 2010, after winning the WBC lightweight title, he took his own life in prison under suspicion of killing his wife.

Andre Ward

The Son of God is ranked as BoxRec’s 12th greatest fighter of all time.

After winning an Olympic gold medal, he went on to win multiple world titles in two weight classes.He retired undefeated and as the WBA, WBO, IBF, and The Ring light heavyweight champion.

LAS VEGAS, NV – JUNE 17: Andre Ward reacts after winning his light heavyweight championship bout against Sergey Kovalev at the Mandalay Bay Events Center on June 17, 2017 in Las Vegas, Nevada. Ward retained his WBA/IBF/WBO titles with a TKO in the eighth round. (Photo by Christian Petersen/Getty Images)

Wang Ya Nan

Wang Ya Nan retired in 2009 as the undefeated middleweight champion. She was the first Chinese boxer to hold the WBC women’s middleweight world title.

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