There have been 1000 of professional packer over the years but most of them , even the greats , mislay a bust or two along the way . Retiring undefeated in the sport is quite an achievement . This list features the only 13 packer in history who were worldly concern champions and managed to finish their careers without losing a fight .
Floyd Mayweather Jr. ( 49 - 0 ) was also an undefeated titleholder , but he ’ll betaking on Conor McGregorof the UFC on August 26th . The list may uprise in the hereafter as there are presently several world genius who are yet to try frustration . These includeAnthony Joshua , Terence Crawford , Joseph Parker , Deontay Wilder , Andre Ward , Gilberto Ramirez , Keith Thurman , Errol Spence Jr. , andGennady Golovkin .
13. Terry Marsh
England ’s Terry Marsh made this list in his second - last calling pro fight when he barricade Joe Manley for the IBF Jr. Welterweight Title in April of 2007 . Marsh then defended it four month later with a seventh - pear-shaped knockout of Akio Kameda and duly hung up his gloves with a near - utter book of 26 - 0 - 1 with 10 Kos . The only blemish on his book was an eight - circular draw with Lloyd Christie in 1982 . Although Marsh had a fine amateur calling , was a European Champion , and went undefeated as a professional , he did n’t really take on any elite opponents during his short career from 1981 to 1987 . The former royal marine stomach from epilepsy and recently take up the hybrid sport of chess - pugilism , becoming a welterweight champion . He ’s also dabbled in acting and government .
12. Harry Simon
Fighting from 1994 to 2016 , Harry Simon of Namibia was a WBO Junior Middleweight Champion . He won the treetop via a decision over Winky Wright in 1998 and went on to defend it four times . He vacated the deed of conveyance and won it back in April , 2002 by beating Armand Krajnc . However , Simon was involved in a distich of automobile accidents and was stripped of the belt when he was too bruise to represent it . The ex - champion was sentenced to two yr in prison in 2005 for culpable homicide in one of the chance event , but appealed it and returned to the ring in 2007 after a five - twelvemonth absence . Simon service his condemnation from 2007 to 2009 and once again returned to the ring in 2010 as a light heavyweight . He retired with a staring mark of 30 - 0 with 22 Kos and a knockout ratio of 73 per centime . Other than Wright and Krajnc , Simon fought mostly Grade B opposition , with foeman such as Wayne Alexander , Hacine Cherifi and Rodney Jones .
11. Pichit Sitbangprachan
Thailand ’s Pichit Sitbangprachan also used the name Supap Hanwichachai and went 24 - 0 as a flyweight with 18 Kos and all of his contests coming in his homeland . After grow pro in 1988 , the southpaw come through the IBF Championship in November , 1992 and hold it until mid-1994 . He defended the belt five times and also campaign several non - title bout while restrain the poll . He retired for the first time in 1994 and give up the belt , but returned in 1996 for one bout before retiring again . However , he back four yr later for two more scrap before fall the gloves up for good . Sitbangprachan ’s best win were over Miguel Martinez , Rodolfo Blanco , Dan Nietes , Antonio Perez and Jose Luis Zepeda .
10. Ji-won Kim
Ji - won Kim hail from South Korea and was a boxing star in the amateurs with several gold medals to his name in various tournaments across the globe . The southpaw deform pro in 1982 , come through a few regional title and then stopped fellow ruralist Suh Sung - in for the IBF Super Bantamweight Title in January , 1985 . Kim defended the championship four times , three by KO and three times against passee - world champs , before retire as the undefeated belt holder at the close of 1986 . His big wins were against Bobby Berna , Suh Sung - in , Rudy Casicas and Ruben Palacios . The reason Kim walk away from pro boxing after just four yr was to sing and act in the theatre . He did n’t succeed all his tear though as Kim struggle to a pair of 10 - round draws with Neptali Alamaq early on in his career and went 16 - 0 - 2 with seven Kos .
9. Mihai Leu
Mihai Leu was born in Romania , but fought his entire pro life history out of Germany and that ’s why he also break by the name Michael Loewe . Leu was a four - metre national paladin as an amateur with a record of 190 - 10 and then fought professionally from 1991 to 1997 with a mark of 28 - 0 with 10 Kos . He won the vacant WBO Welterweight Championship in 1997 by decision over Santiago Samaniego . Leu champion the belt seven calendar month afterwards by bulk determination over Michael Carruth and that was the end of his pro boxing days . Unfortunately , he did n’t take on any elect opponent during his calling . He had sustain an injury which would n’t let him to box anymore , but then follow in his father ’s and brother ’s footsteps by sprain to mass meeting drive . He became quite good at it and later won a Rumanian national championship .
8. Jimmy Barry
We ’re function to jaunt back in clock time now to another era of fisticuffs to visit Jimmy ‘ The Little Tiger ’ Barry of Chicago . Barry fought from 1891 to 1899 with an prescribed record book of 59 - 0 - 10 with 40 coss . Barry boxed to 10 draws in his career , including each one of his last nine fights . He won the vacant World Bantamweight Title in December , 1894 and retired as the undefeated king in September of 1899 . Walter Croot , one of Barry ’s opponents , died the day after their binge in December , 1897 and the adept was commove with manslaughter . However , the charge were knock off after examinations revealed Croot ’s death was caused when his heading bounce off the trading floor after being knock down . The disaster then resulted in the introduction of the padded anchor ring canvass . Barry felt horrific about Croot and fight back 10 clip after the accident with just one profits .
7. Dmitry Pirog
Dmitry Pirogof Russia had a relatively short pro career from 2005 to 2012 . He turn in due to a back problem , but managed to go 20 - 0 with 15 Kos . He also got his hands on the WBO Middleweight Championship in 2010 and held onto it for two years . Pirog reportedly went 200 - 30 as an amateur and won several regional pro belts before meeting Daniel Jacobs for the vacant WBO Middleweight Championship in July , 2010 . Jacobs was the clear front-runner , but Pirog pulled of a Brobdingnagian cushion by halt the unbeaten American in the fifth daily round . He defended the title three times and was then plunder of it for prefer to fit fellow paladin Gennady Golovkin rather than defend it against Hassan N’Dam N’Jikam , who was the WBO ’s interim champ . alas , Pirog retired before match Golovkin , but his biggest wins came over Jacobs , Nobuhiro Ishida , Gennady Martirosyan and Kofi Jantuah .
6. Jack McAuliffe
Like Jimmy Barry , Jack McAuliffe of Cork , Ireland boxed in the late nineteenth century . He was a jackanapes who fought in America from 1885 to 1897 with an official ring record of and 28 - 0 - 10 with 20 kos . He also fought many more unofficial bouts and was known as ‘ The Napoleon of the Ring . ’ Barry was recognized as the very first Lightweight Champion of the World between 1886 and 1893 . The hall of famer started out in the amateur order two days before turn pro . Boxing was a portion different in that era as McAuliffe often fight more than 20 rounds with his longest round being tape at 64 rounds . McAuliffe was the first humanity supporter to go undefeated when he decided he ’d had enough in 1897 .
5. Edwin Valero
Edwin Valero of Venezuela , live a short , tragic life , but accomplished a passel in the ring before it end at the historic period of 28 in 2010 . He deform professional in 2002 after an excellent amateur career at 86 - 5 with 57 Kos and managed to go 27 - 0 as a pro with every fight ending in a sweetheart . The southpaw was also the first boxer in account to bug out his pro career at 18 - 0 with 18 first - turn knockouts . Valero won the WBA Super Featherweight Title in 2006 by stopping Vicente Mosqueran and oppose it four times . He then moved up to lightweight and win the vacant WBC Belt against Antonio Pitalua . Valero defended it against Hector Velasquez and Antonio DeMarco before thing decrease apart . He was arrested in March , 2010 for allegedly assaulting his married woman , but Valero pronounce she had fallen down the stairs . The boxer was sent for psychiatric treatment and just a calendar month later was hauled in for bump off his wife . Valero reportedly admitted the cleanup and hang himself in his cellphone too soon the next Clarence Day .
4. Sven Ottke
Another excellent amateur boxer who turn pro and pass unbeaten was three - sentence Olympian Sven Ottke of Germany . He went 256 - 47 - 5 as an amateur and then compiled a record of 34 - 0 with six Kos as a pro from 1997 to 2004 . He did n’t have much in the way of power , but Ottke ’s fisticuffs skills enabled him to win the WBA ( Super ) and IBF Super Middleweight Titles and reign as a public champion for six years while retiring with both bang . Ottke support his championships a total of 21 times with wins over the like of Armand Krajnc , Robin Reid , Byron Mitchell , Joe Gatti , Thomas Tate , Charles Brewer , Anthony Mundine and Glen Johnson . He also beat some top opponents as an amateur including next world champions Michael Moorer , Chris Byrd and Antonio Tarver .
3. Joe Calzaghe
SouthpawJoe Calzaghewas digest in London , England , but move to Wales when he was a bambino . He started box as a nine - yr - old and went 112 - 10 as an amateur . He turned pro in 1993 and did n’t give ear up his gloves until 2008 . Along the direction Calzaghe racked up a perfect record of 46 - 0 with 32 Kos . ‘ The Pride of Wales ’ won the vacant WBO Super Middleweight Title with a win over Chris Eubank in October , 1997 and would later supply the IBF , WBC and WBA ( super ) versions of the belt . He ’s the longest - reign superstar in the story of the 168 lb . part and defended his title 21 times before incite up to light heavyweight for his last two bouts . Calzaghe then beat Bernard Hopkins for the Ring Magazine title and defended it against Roy Jones Jr. before strike out . As a A-one middleweight , the hall of famer beat some all right boxers such as Robin Reid , Omar Sheika , Mario Veit , Charles Brewer , Byron Mitchell , Jeff Lacy and Mikkel Kessler .
2. Ricardo Lopez
Mexico ’s Ricardo “ El Finito ” Lopez was one of the great little men in boxing and also arguably has the best phonograph record of the 13 undefeated champions . He push from 1985 to 2001 with a near - perfect mark of 51 - 0 - 1 with 38 Kos . He win the WBC and Lineal Minimumweight Titles in 1990 when he break off Japan Hideyuki Ohashi of Japan in the 5th round in Tokyo . Lopez then went on to support his rap 21 sentence to arrange a new criminal record for the division . The Granville Stanley Hall of famer added the WBO Minimumweight Crown in 1997 with a KO over Alex Sanchez and puzzle Rosendo Alvarez the next year to win the WBA version of the title . In his very next battle he move up to light flyweight and captured the IBF Crown in that sectionalization . Lopez defend it twice and then pull back as one of boxing ’s all - time great champion . In plus , he went unbeaten in the amateur and became the first human beings to never turn a loss a bust in his career while his 26 statute title tear without defeat are a record book apportion with Floyd Mayweather Jr. and Joe Louis .
1. Rocky Marciano
The most famous boxer on this list is doubtless former heavyweight champion and hall of famer Rocky Marciano of Massachusetts . ‘ The Brockton Blockbuster ’ place as one of the greatest ever with his book of 49 - 0 with 43 Kos between 1947 and 1955 . Marciano possessed tremendous baron even though he was just over 5 - feet-10 - inches tall . He fought just 12 amateur bouts while in the army and then won the World Heavyweight Title in his 43rd pro fighting by stopping Jersey Joe Walcott in the 13th round . Marciano defended his championship six times , including a rematch with Walcott , before retiring at the eld of 32 . He contemplate a comeback in 1959 , but ultimately decide against it . Marciano would lose his life-time in a belittled sheet crash in 1969 when he was 45 , just a sidereal day before his natal day . His pugilism record also include win over Archie Moore , Don Cockell , Ezzard Charles ( double ) , Lee Savold , Harry Matthews and the greatJoe Louis .
