Jorge Armando Arce Armenta, best known as Jorge Arce, is a Mexican former professional boxer who competed from 1996 to 2014. He is a multiple-time world champion, and the second boxer from Mexico to win world titles in four weight divisions. In a storied career, Arce held the WBO light flyweight title from 1998 to 1999; the WBC and lineal light flyweight titles from 2002 to 2004; the WBO super flyweight title in 2010; the WBO junior featherweight title in 2011; and the WBO bantamweight title from 2011 to 2012. Additionally he held the WBC interim flyweight title from 2005 to 2006, the WBA interim super flyweight title from 2008 to 2009, and challenged once for the WBC featherweight title in his final fight in 2014.
Humberto González is a Mexican former world boxing champion. He held the WBC three times, IBF and Lineal Jr. Flyweight titles. He was nicknamed Chiquita.
Ricardo López Nava is a Mexican former professional boxer who competed from 1985 to 2001. He was a two-weight world champion, having held the WBC mini flyweight title from 1990 to 1998, defending it against a record-breaking 21 opponents; the WBA and WBO mini flyweight titles between 1997 and 1998; and the IBF junior flyweight title from 1999 until his retirement in 2001. He is one of just fifteen world boxing champions to retire without a loss. He is the father of undefeated former boxer Alonso López.
Brian Viloria is a retired American professional boxer of Filipino descent. He is a former unified WBA and WBO flyweight champion, as well as a former WBC and IBF light flyweight champion. His nickname of "The Hawaiian Punch" was first given to him by Jesus Salud, a fellow Hawaiian of Filipino descent and himself a former world champion in boxing.
Hugo Fidel Cázares is a Mexican professional boxer who is the former WBA Super Flyweight champion, WBO and Lineal Light Flyweight champion.
Roberto Garcia Cortez, best known as Robert Garcia, is an American former professional boxer who competed from 1992 to 2001, and held the IBF junior lightweight title from 1998 to 1999. He has since worked as a boxing trainer, and was voted Trainer of the Year by The Ring magazine in 2011, and by the Boxing Writers Association of America in 2012. He is the older brother of professional boxer Mikey Garcia, who is a world champion in four weight classes.
Javier Rogelio Jáuregui Delgado, also known as El Chatito, was a Mexican professional boxer in the lightweight division.
Donnie Liboon Nietes is a Filipino professional boxer. He is a world champion in four weight-classes, having previously held the WBO mini-flyweight title from 2007 to 2011; the WBO and The Ring magazine junior-flyweight titles between 2011 and 2016; IBF flyweight title from 2017 to 2018; and the WBO junior-bantamweight title from 2018 to 2019. He is the longest-reigning Filipino boxing world champion, surpassing in 2014 the record set in 1967 by Boxing Hall of Fame inductee Gabriel "Flash" Elorde. He was one of the first three Asian fighters with world titles in at least four weight classes alongside fellow Filipinos Manny Pacquiao and Nonito Donaire.
Carlos Roberto Cuadras Quiroa is a Mexican professional boxer who held the WBC super flyweight title from 2014 to 2016. As an amateur he won a gold medal in the bantamweight division at the 2007 Pan American Games.
Raúl "Rayito" García Hirales is a Mexican former professional boxer from La Paz, Baja California Sur, México. He has held the IBF mini flyweight title from June 2008 until March 2010 and WBO mini flyweight title from April 2011 until October 2011. He is the twin brother of former WBO light flyweight champion Ramón García Hirales.
John Riel Casimero is a Filipino professional boxer. He has held world championships in three weight classes; the WBO bantamweight title from 2019 to 2021; the IBF junior-flyweight title from 2012 to 2013; and the IBF flyweight title in 2016. Quadro Alas is Tagalog for four of a kind when translated, his moniker means Four Aces.
Ramón García Hirales is a Mexican professional boxer who held the WBO light flyweight title in 2011. He is the twin brother of ex-WBO and IBF minimumweight world champion Raúl García.
Julio César Borboa García was a Mexican professional boxer. He is a former NABF and the IBF Super Flyweight Champion.
Edgar Cárdenas is a Mexican boxer in the Bantamweight division. He is a former WBC Continental Americas light flyweight, WBO NABO light flyweight, and the IBF minimumweight champion.
Akira Yaegashi is a Japanese former professional boxer who competed from 2005 to 2019. He was a three-weight world champion, having held the WBA mini-flyweight title from 2011 to 2012; the WBC, Ring, and lineal flyweight titles from 2013 to 2014; and the IBF light-flyweight title from 2015 to 2016. He is an alumnus of the Takushoku University.
José Eduardo Argumedo Barraza is a Mexican professional boxer who held the IBF mini flyweight title from 2015 to 2017.
Felix Pedro Alvarado Sanchez is a Nicaraguan professional boxer who has held the IBF light flyweight title since 2018. He previously challenged for the WBA (Regular) light flyweight title in 2013, and the WBA (Regular) flyweight title in 2014. His twin brother, René Alvarado, is also a professional boxer.
Daniel Matellon Ramos is a Cuban professional boxer who held the WBA interim light flyweight title from February to August 2021.
Jessica Chávez Valencia is a Mexican professional boxer. She is a former world champion in two weight classes, having held the IBF female light flyweight title from 2011 to 2013 and the WBC female flyweight title from 2015 to 2017. She also challenged for the WBC female light flyweight title in 2014 and the WBC female super flyweight title in 2019. As of September 2020, she is ranked as the world's second best active female super flyweight by The Ring and third by BoxRec.
María Guadalupe Bautista Hernández is a Mexican professional boxer. She is a two-time world light flyweight champion, having held the WBA (Regular) female title since December 2020 and previously the IBF female title in 2018. As of December 2020, she is ranked as the world's ninth best active female light flyweight by BoxRec.
Ulises Lara
Akira Yaegashi 
Milan Melindo 
Mauricio Fuentes