| Minimumweight 105 | Siyakholwa Kuse | SuperOscar Collazo
RegularTakeshi Ishii | Pedro Taduran | Oscar Collazo
InterimRyusei Matsumoto | Oscar Collazo | — |
| Light flyweight 108 | Shokichi Iwata
SilverAaron De La Cruz | SuperRene Santiago
RegularDaiya Kira | Thanongsak Simsri | Rene Santiago | — | — |
| Flyweight 112 | Ricardo Rafael Sandoval
InterimGalal Yafai | RegularRicardo Rafael Sandoval
InterimAbraham R Perez | Masamichi Yabuki | Anthony Olascuaga | — | — |
| Super flyweight 115 | Ricardo Malajika
SilverGohan Rodriguez | RegularDavid Jimenez | Andrew Moloney | Kenshiro Teraji | — | — |
| Bantamweight 118 | Takuma Inoue
SilverAndrew Cain | SuperJesse Rodriguez
RegularRiku Masuda | Jose Salas Reyes | Christian Medina | — | — |
| Super bantamweight 122 | Naoya Inoue | SuperNaoya Inoue
InterimGary Antonio Russell | Naoya Inoue
InterimSam Goodman | SuperNaoya Inoue | Naoya Inoue | Naoya Inoue |
| Featherweight 126 | Bruce Carrington
RecessRey Vargas
SilverAlan Picasso | RegularBrandon Figueroa | Angelo Leo | Rafael Espinoza | — | — |
| Super featherweight 130 | O'Shaquie Foster
InterimRyan Garner
SilverKhalil El Hadri | SuperAnthony Cacace
RegularElnur Samedov | Emanuel Navarrete | SuperEmanuel Navarrete | — | — |
| Lightweight 135 | William Zepeda
InterimJadier Herrera | — | — | Abdullah Mason | — | — |
| Super lightweight 140 | Dalton Smith
InterimIsaac Cruz Jr
SilverOscar Duarte Jurado | RegularGary Antuanne Russell | — | Shakur Stevenson | Shakur Stevenson | Shakur Stevenson |
| Welterweight 147 | Ryan Garcia
SilverSouleymane Cissokho | SuperTeofimo Lopez
RegularJack Catterall | Liam Paro | Devin Haney | — | — |
| Super welterweight 154 | Sebastian Fundora
InterimVERGIL ORTIZ Jr.
SilverErmal Hadribeaj | RegularJaron Ennis | Josh Kelly | Jaron Ennis | — | — |
| Middleweight 160 | Carlos Adames
InterimJesus Ramos | RegularErislandy Lara | Aaron McKenna | Denzel Bentley | — | — |
| Super middleweight 168 | Christian Mbilli
InterimLester Martinez
SilverDiego Pacheco | RegularJaime Munguia | Osleys Iglesias | — | — | — |
| Light heavyweight 175 | David Benavidez
SilverBen Whittaker | SuperDmitry Bivol
InterimAlbert Ramirez | Dmitrii Bivol | Dmitrii Bivol
InterimCallum Smith | Dmitry Bivol | Dmitry Bivol |
| Cruiserweight 200 | Michal Cieslak
SilverRobin Sirwan Safar | SuperDavid Benavidez
RegularJai Opetaia | — | David Benavidez | Jai Opetaia | Jai Opetaia |
| Bridgerweight 224 | Ryad Merhy | — | — | — | — | — |
| Heavyweight + | Agit Kabayel | RegularMurat Gassiev | Filip Hrgovic | Daniel Bubois | Oleksandr Usyk | Oleksandr Usyk |