Following the name of the champion(s): Indicates the number of times the competitor has held that title at that point.
[...]
Indicates a gap in the listing where title changes are not known.
<
Title was held or changed hands no later than this. In these cases, it is known that a competitor held the title at a certain time but not when he/she won it.
@
Order uncertain. Different titleholders may be known for the same year, for example, but it is not known who held the title before whom.
#
Unofficial or disputable claims. These are usually matches that certainly took place, but where there is doubt that the competitor shown should be recognized as a true title holder. These listings are also italicized.
International Boxing Federation
World Junior Flyweight Title (as of 2025-08-31)
* Bolded letters in the competitor's name, if any, indicate the surname/family name.
Dodie Boy Peñalosa
1983-12-10
Ōsaka, JPN
Defeats Shingaki Satoshi; stripped of the title on 86-07-18 for failing to make a mandatory defense by a deadline.
Choi Jum-hwan
1986-12-07
Busan, KOR
Defeats Park Cho-Woon.
Tacy Macalos
1988-11-04
Quezon City, PHI
Muangchai Kittikasem
1989-05-02
Bangkok, THA
Michael Carbajal
1990-07-29
Phoenix, AZ, USA
Humberto González
1994-02-19
Inglewood, CA, USA
Saman Sorjaturong
1995-07-15
Inglewood, CA, USA
Vacates on 95-11-01.
Michael Carbajal [2]
1996-03-16
Las Vegas, NV, USA
Defeats Melchor Cob Castro.
Mauricio Pastrana
1997-01-18
Las Vegas, NV, USA
Stripped of the title on 97-05-09 after withdrawing from a match against Manuel Herrera due to epididymitis.
Mauricio Pastrana [2]
1997-12-13
Pompano Beach, FL, USA
Defeats Manuel Herrera; stripped of the title on 98-08-28 after failing to make weight the day before his bout with Carlos Murillo.
Will Grigsby
1998-12-18
Ft. Lauderdale, FL, USA
Defeats Ratanapol Sor Vorapin.
Ricardo López
1999-10-02
Las Vegas, NV, USA
Vacates on 02-11-28 upon retirement.
Víctor Burgos
2003-02-15
Las Vegas, NV, USA
Defeats Alex Sánchez.
Will Grigsby [2]
2005-05-14
Las Vegas, NV, USA
Ulises Solís
2006-01-07
New York, NY, USA
Brian Viloria
2009-04-19
Manila, PHI
Carlos Tamara
2010-01-23
Manila, PHI
Luis Alberto Lazarte
2010-05-29
Buenos Aires, ARG
Ulises Solís
2011-04-30
Mar del Plata, ARG
Stripped of the title on 12-07-19 due to inactivity stemming from injuries suffered during a street fight in 11-10.
Johnriel Casimero
2012-07-19
Interim champion since defeating Luis Alberto Lazarte on 12-02-10 in Buenos Aires, ARG; status promoted; stripped of the title on 14-05-02 after failing to make weight the day before his fight against Mauricio Fuentes.
Javier Mendoza
2014-09-20
Tijuana, BC, MEX
Defeats Ramón García Hirales.
Yaegashi Akira
2015-12-29
Tōkyō, JPN
Milan Melindo
2017-05-21
Tōkyō, JPN
Taguchi Ryōichi
2017-12-31
Tōkyō, JPN
Hekkie Budler
2018-05-20
Tōkyō, JPN
Vacates on 18-07-24 due to the low purse to defend it against his mandatory challenger Felix Alvarado.
Felix Alvarado
2018-10-29
Pasay City, PHI
Defeats Randy Petalcorin; vacates on 22-03-21 upon moving up to the flyweight division.
Sivenathi Nontshinga
2022-09-03
Hermosillo, SO, MEX
Defeats Hector Flores Calixto.
Adrian Curiel
2023-11-04
Monte Carlo, MON
Sivenathi Nontshinga
2024-02-16
Oaxaca, MEX
Yabuki Masamichi
2024-10-12
Tokoname, Aichi, JPN
Also wins the flyweight title on 25-03-29; vacates the junior flyweight title on 25-04-08.
