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Marciano 49-0, Mayweather 50-0 among excellent boxing careers

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Rocky Marciano undefeated heavyweight champion portrait

Boxing has produced many champions with long winning streaks, but very few retire undefeated. Two of the most celebrated undefeated careers in the sport belong to Rocky Marciano and Floyd Mayweather Jr., whose perfect records still serve as a benchmark every time another fighter begins to approach the finish line undefeated.

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Marciano retired in September 1955 with a record of 49-0 (43 KOs) after defeating Archie Moore to retain the heavyweight title. His mark became one of boxing’s most celebrated records and became the standard for an undefeated career at the highest level for decades.

Mayweather later surpassed that total, finishing his professional career with a record of 50-0 (27 KOs) after a victory over Conor McGregor in August 2017. Two years earlier, Mayweather had already scored one of the most lucrative victories in the sport, defeating Manny Pacquiao by unanimous decision in May 2015.

Several other champions came close to breaking these perfect records before suffering their first defeat at the end of their careers. Heavyweight champion Larry Holmes began his title defense in September 1985 with a 48-0 record before losing a decision to former lithe heavyweight champion and 1976 Olympic gold medalist Michael Spinks.

Brazilian legend Éder Jofre also had a long unbeaten streak before his first defeat. Jofre entered the 1965 bantamweight title fight with a record of 47-0-3 before losing a split decision to the Japanese organization Fighting Harada.

The remaining champions managed to end their careers undefeated. Welsh great Joe Calzaghe retired in November 2008 with a record of 46-0 (32 KOs) following victories over Roy Jones Jr. and Bernard Hopkins in the final stage of his career. Earlier in his championship career, Calzaghe also defeated Denmark’s Mikkel Kessler in a super middleweight unification fight.

There have been long periods of undefeated fighters in the history of boxing. According to The Ultimate Encyclopedia of Boxing by historian Harry Mullan, notable longer undefeated streaks include Packey McFarland (97 fights), Fred Dyer (94 fights), Pedro Carrasco (93 fights), Sugar Ray Robinson (91 fights) and Julio César Chávez Sr. (90 fights).

Marciano’s 49-0 and Mayweather’s 50-0 remain the most recognizable perfect records in boxing history. In a sport where even great champions often suffer defeats over the course of long careers, retiring undefeated remains one of the rarest of achievements.

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Categories Floyd Mayweather Jr. and Rocky Marciano

Last updated: 14/03/2026 at 15:08

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Boxing

Gervonta Davis is currently in “advanced talks” regarding a meeting with the former champion: “I expect it will happen”

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Gervonta Davis now in ‘advanced talks’ to face former champion: “I expect it to happen”

Gervonta Davis is reportedly planning to return to the ring this summer, and a rematch with the former 140-pound world champion appears to be a real possibility.

The 31-year-old has not fought since a controversial draw with Lamont Roach, who was saddened that he did not score a shock victory in March 2025.

Later that year, “Tank” was reportedly in talks for an immediate rematch with Roach, only to have an exhibition fight with Jake Paul instead.

This is a chance though collapsed after Davis was taken to civil courtwhich resulted in Paul facing Anthony Joshua in December instead.

Then, earlier this year, it was revealed that Davis had an arrest warrant out for his arrest on charges related to battery, false imprisonment and attempted kidnapping.

As a result, the hard-hitting southpaw was stripped of his WBA lightweight world title, but was named “intermission champion,” meaning he could potentially be reinstated as the full 135-pound champion.

However, – reports Mike Coppinger from Ring magazine that Davis is considering a rematch with Isaac Cruz, whom he passed by unanimous decision, in 2021 at 140 pounds.

“That’s what I was told [Gervonta Davis] he is currently in advanced talks regarding a rematch with Pitbull Cruz at 140, not 135, as in the first fight this summer. I expect it to happen.”

Even though Davis claimed a unanimous decision victory, many believe that Cruz gave the Baltimore fighter one of the toughest tests of his professional career, with Roach being the only fighter to go the full distance of 12 rounds.

As for his move to super lightweight, where he stopped Mario Barrios in the 11th round in 2021, it opens the door to fights with the likes of Keyshawn Davis.

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Boxing

Dickens vs Cacace results LIVE from Dublin

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James “Jazza” Dickens vs Anthony Cacace ahead of their WBA super featherweight title fight in Dublin

LIVE COVERAGE

World Boxing News will report live results from this weekend’s sold-out St. Patrick’s Day event. Patrick’s Day at the 3Arena in Dublin, the main event of which will be the fight for the WBA super featherweight title between James “Jazz” Dickens and Anthony Cacace.

The card will be broadcast live on DAZN and will also feature co-fights with Pierce O’Leary taking on Maxi Hughes and Jono Carroll taking on Colm Murphy.

WBN will also provide a live results list from the main event when the opening bell sounds.

Dickens vs Cacace results

Undercard results and round-by-round updates will be posted here as events unfold in Dublin.

Other attacks

Davey Joyce vs. Wendel Da Costa Santos
Super featherweight

Barry McReynolds vs. Jonatas Rodrigo Gomes de Oliveira
Very lightweight

Eugene McKeever vs. Adrian Orban
Welterweight

Adam Olaniyan vs. Jan Bezouska
Heavyweight

Bobbi Flood vs. Bela Istvan Orban
Medium weight

Gary Cully vs. Benito Sanchez Garcia
Very lightweight

Thomas Carty vs. German Skobenko
Heavyweight

Ryan Garner vs. Cristian Bielma
Lithe

Eoghan Lavin vs. Liam Walsh
Medium weight

Steven Cairns vs. Arnie Dawson fight
WBA Continental lightweight title

Recommended fights

Jono Carroll vs Colm Murphy fight
Super featherweight

Pierce O’Leary vs. Maxi Hughes
Very lightweight

Main event

James Dickens vs. Anthony Cacace
WBA super featherweight title

Queensberry

Dickens vs Cacace weigh-in results

Both fighters successfully made weight before their championship clash.

James Dickens – £129.14
Anthony Cacace – 129.5 pounds

Pierce O’Leary – 139.8 pounds
Maxi Hughes – 139.12 lbs

Jono Carroll – 129.1 pounds
Colm Murphy – 129.1 lbs

Steven Cairns – 134.7 lbs
Arnie Dawson – 134.11 pounds

Thomas Carty – 263 pounds
German Skobenko – 245 pounds

Eoghan Lavin – 159.15 pounds
Liam Walsh – 158.15 pounds

Bobbi Flood – 155.13 lbs
Bela Istvan Orban – 152.4 pounds

Gary Cully – 142.10 pounds
Benito Sanchez Garcia – 143 pounds

Adam Olaniyan – 242 pounds
Jan Bezouska – 301 pounds

Barry McReynolds – 142.9 lbs
Jonatas de Oliveira – 139.8 pounds

Eugene McKeever – 147.14 pounds
Adrian Orban – 148.12 pounds

Ryan Garner – 137.13 pounds
Cristian Bielma – 138.15 pounds

Davey Joyce – 131.11 pounds
Wendel Da Costa Santos – 134.3 pounds

How to watch

The event is promoted by Queensberry Promotions and broadcast live on DAZN.

Quick notes

Venue: 3Arena, Dublin
Committee: Irish Athletics Boxing Association
Organizer: Queensberry Promotions

Stay tuned to World Boxing News for live updates, live scoreboard and official results as the Dublin card develops.


About the author

Phil Jay is the editor-in-chief of World Boxing News (WBN) and a boxing veteran with over 15 years of experience. Read the full biography.

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Boxing

Arnold Barboza Jr and Kenneth Sims Jr live scores from Anaheim

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Image: Arnold Barboza Jr vs Kenneth Sims Jr Live Results from Anaheim

Golden Boy returns to Anaheim tonight with a welterweight main event between Arnold Barboza Jr and Kenneth Sims Jr scheduled for 12 rounds at the Honda Center.

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We’ll be posting live scores and fight updates here, along with round-by-round scoring and notes posted in the comments during the broadcast.

Event details

Start time: 8:00 PM EST
Streaming: DAZN (subscription)
Location: Honda Center – Anaheim, California

Main Card

Joel Iriarte vs Rock Myrthil – welterweight, 8 rounds

Gabriela Fundora vs. Viviana Ruiz – flyweight, 10 rounds, for Fundora’s undisputed championship (WBC, WBA, IBF, WBO titles)

Alexis Rocha vs. Joseph Diaz Jr. — super welterweight, 10 rounds

Oscar Collazo vs Jesus Haro – minimum weights, 12 rounds, for Collazo’s WBA and WBO titles

Arnold Barboza Jr vs. Kenneth Sims Jr – welterweight, 12 rounds

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Last updated: 14/03/2026 at 10:52

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