Ria Ramnarine is a Trinidadian and Tobagonian former professional boxer who competed from 1999 to 2012. During her career, she held world titles in two weight-classes; the WIBA minimumweight title from 2005 to 2006; the WIBF minimumweight and WIBA light flyweight titles in 2011. She also challenged once for the WBA female minimumweight title in 2010. She was Trinidad and Tobago's first female world champion.
Juan Manuel Márquez Méndez is a Mexican former professional boxer who competed from 1993 to 2014. He is the third Mexican boxer to become a world champion in four weight classes, having held nine world major titles from featherweight to light welterweight, including the lineal championship at lightweight.
Muhammad Rachman is an Indonesian professional boxer. An over twenty-year veteran of the sport, he is a two-time minimumweight world champion, having held the IBF title from 2004 to 2007 and the WBA title in 2011.
Cecilia Carmen Linda Brækhus is a Norwegian professional boxer and former kickboxer. In boxing she reigned as the undisputed female welterweight champion from 2014 to 2020, and is the first woman in any weight class to hold the WBA, WBC, IBF and WBO titles simultaneously. She is also one of only 11 boxers in history, female or male, to hold all four major world titles simultaneously. In 2017, the Boxing Writers Association of America named Brækhus their inaugural Female Fighter of the Year. Guinness World Records awarded her with three recognitions in 2018: the Longest Reigning Female Boxing Champion, the Longest Reign as a Four-Belt Undisputed Boxing Champion, and the Most Bouts Undefeated by a Female World Champion Boxer. As of September 2020, she is ranked as the world's second best active female welterweight by The Ring and BoxRec, and the third best active female, pound-for-pound, by The Ring, fifth by ESPN, and sixth BoxRec.
Juan Jose Landaeta is a professional boxer from Venezuela. Juan Jose fought for the World Boxing Association (WBA) light flyweight title and minimumweight title. Also, Juan Jose won the WBA interim minimumweight title.
Carlos Velarde is a Mexican professional boxer. He challenged for the WBA minimumweight title in 2013 and the WBO light flyweight title in 2014.
Kazuto Ioka is a Japanese professional boxer. He is the first male Japanese boxer and fourth Asian to be a four-weight world champion, having held the unified WBA and WBC mini-flyweight titles between 2011 and 2012, the WBA (Regular) light-flyweight title from 2012 to 2014, the WBA flyweight title from 2015 to 2017, and the WBO super-flyweight title from 2019 to 2023. As of December 2020, he is ranked as the world’s fourth-best active super-flyweight by BoxRec, and third by The Ring magazine and the Transnational Boxing Rankings Board. He is also ranked as the world's ninth-best boxer, pound for pound, by The Ring.
José Jesús Silvestre Cárdenas is a Mexican professional boxer and the former WBA World minimumweight interim champion. Silvestre is promoted by Saúl Álvarez' company, Canelo Promotions.
Pornsawan Porpramook (Thai: พรสวรรค์ ป.ประมุข born in Ta Phraya District, Prachinburi Province is a Thai professional boxer in the minimumweight division and is a former WBA minimumweight champion. Porpramook has been also rated in the top ten by Ring Magazine at minimumweight until as of October 2011. Porpramook lost the title in his first defence against Japan's Akira Yaegashi via a tenth round technical knockout at the Korakuen Hall in Tokyo on October 24, 2011. Porpramook fought again for the WBA minumumweight world title on December 31, 2012 against Ryo Miyazaki, where he lost by split decision.
Ronald Barrera is a Colombian professional boxer who currently fights in the flyweight division and has fought for major world titles five times, losing each attempt.
Thammanoon Niyomtrong, known by his ring name Knockout CP Freshmart, is a Thai professional boxer and former Muay Thai fighter who has held the WBA (Super) mini-flyweight title since 2016.
Jorle Estrada is a Colombian minimumweight boxer. Estrada lost to Merlito Sabillo for the WBO minimumweight title. Estrada has also fought Carlos Velarde, Carlos Buitrago and Alexis Díaz.
Zhang Junlong is a Chinese professional boxer who held the WBA Oceania heavyweight title between 2016 and 2017.
Yutthana Kaensa, known as Stamp Kiatniwat, Stamp Sithmorseng, or Stamp Kratingdaenggym, is a professional boxer from Thailand in the flyweight division. He was considered the youngest Thai world champion at the age of 17. He is a former WBA Asia Flyweight champion.
Seniesa Carmen Estrada is an American professional boxer who has held the WBA minimumweight title since March 2021 and the World Boxing Council minimumweight title since March 2023. She previously held the WBC Silver light flyweight title from 2018 until 2021 and the WBA interim flyweight title from 2019 to 2020. As of September 2020, she is ranked as the world's fifth best active female light flyweight by The Ring and ninth by BoxRec.
Anabel Ortiz Morales is a Mexican professional boxer. She is a two-time mini flyweight world champion, having held the WBA title since 2013 and previously the WBC title from 2009 to 2011. She also challenged once for the unified WBA, and WBO light flyweight titles in 2012. As of May 2020, she is ranked as the world's fifth best active female minimumweight by BoxRec.
Naoko Fujioka is a Japanese professional boxer. She is Japan's first ever five-division world champion, having held the WBA female flyweight title between March 2017 to April 2022. She also previously held the WBC female minimumweight; WBO female junior-flyweight; WBA female super-flyweight; and WBO female bantamweight titles between 2012 and 2017. As of September 2020, she is ranked as the world's best active female flyweight by The Ring and BoxRec.
Monserrat Alarcón is a Mexican professional boxer. She is a world champion in two weight classes, having held the WBA female light minimumweight title since 2018 and previously the WBO female flyweight title from 2017 to 2018. As of May 2020, she is ranked as the world's best active female light minimumweight by BoxRec.
Erick Yomer Rosa Pacheco is a Dominican professional boxer who has held the WBA (Regular) mini flyweight title since 2021.
Yenrry Bermudez
Jose Antonio Jimenez
José Argumedo 
Knockout CP Freshmart 
Carlos Melo 