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10 amazing boxers with the longest winning streaks, including Julio Cesar Chavez, Roberto Duran and Floyd Mayweather Jr
![MMA History Today en Twitter: "Apr27.1956 Legendary Boxer Rocky Marciano Announces his Retirement from Boxing He retired with a Record of 49-0 http://t.co/uV2jssrbs6" / Twitter MMA History Today en Twitter: "Apr27.1956 Legendary Boxer Rocky Marciano Announces his Retirement from Boxing He retired with a Record of 49-0 http://t.co/uV2jssrbs6" / Twitter](https://pbs.twimg.com/media/BmQxckYCIAAS5w-.jpg)
MMA History Today en Twitter: "Apr27.1956 Legendary Boxer Rocky Marciano Announces his Retirement from Boxing He retired with a Record of 49-0 http://t.co/uV2jssrbs6" / Twitter
![Floyd Mayweather equals 49-0 record with unanimous decision victory over Andre Berto - Sport360 News Floyd Mayweather equals 49-0 record with unanimous decision victory over Andre Berto - Sport360 News](https://sport360.com/wp-content/uploads/articles7/media-42133.jpg)
Floyd Mayweather equals 49-0 record with unanimous decision victory over Andre Berto - Sport360 News
Aesthetics Personal Training - Aberdeen - 🥊 Rocky Marciano with the help of his personal trainer & limited use of equipment became boxing World Heavyweight Champion. His outstanding 49-0 record makes him
![I've accomplished everything': Floyd Mayweather bows out with 49-0 record after defeating Berto-Sports News , Firstpost I've accomplished everything': Floyd Mayweather bows out with 49-0 record after defeating Berto-Sports News , Firstpost](http://www.firstpost.com/wp-content/uploads/2015/09/Mayweather_AP_final-fight.jpg)
I've accomplished everything': Floyd Mayweather bows out with 49-0 record after defeating Berto-Sports News , Firstpost
Rocky Marciano's record has been equalled but the love and awe he inspired will always leave him out of reach of others - Steve Bunce | The Independent | The Independent
![Rocky Marciano's legendary 49-0 record: For it to be truly broken, must it be a reigning heavyweight champion who reaches 50-0? Rocky Marciano's legendary 49-0 record: For it to be truly broken, must it be a reigning heavyweight champion who reaches 50-0?](https://www.boxing247.com/wp-content/uploads/2017/04/marciano423.jpg)
Rocky Marciano's legendary 49-0 record: For it to be truly broken, must it be a reigning heavyweight champion who reaches 50-0?
![Brazil's Acelino Freitas, the World Boxing Lightweight champion, works out on a speed bag at his training camp in Fernwood, Pennslyvania, June 28. Freitas, from Salvador, Bahia and with an undefeated record Brazil's Acelino Freitas, the World Boxing Lightweight champion, works out on a speed bag at his training camp in Fernwood, Pennslyvania, June 28. Freitas, from Salvador, Bahia and with an undefeated record](https://c8.alamy.com/comp/2D493D3/brazils-acelino-freitas-the-world-boxing-lightweight-champion-works-out-on-a-speed-bag-at-his-training-camp-in-fernwood-pennslyvania-june-28-freitas-from-salvador-bahia-and-with-an-undefeated-record-of-35-0-0-will-defend-his-championship-against-us-boxer-diego-corrales-38-2-0-on-august-7-reutersteddy-blackburn-tbgn-2D493D3.jpg)
Brazil's Acelino Freitas, the World Boxing Lightweight champion, works out on a speed bag at his training camp in Fernwood, Pennslyvania, June 28. Freitas, from Salvador, Bahia and with an undefeated record
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