Heavyweight
- Tai “Bam Bam” Tuivasa
- “The Prince of War” Greg Hardy
- Juan “The Kraken” Adams
- Giacomo “The Viking” Lemos
- Cyril “Bon Gamin” Gane
- Alexander “King Kong” Romanov
- Tom Aspinall
Light Heavyweight
- Aleksandar Rakić
- Dominick “The Devastator” Reyes
- Tyson Pedro
- Volkan “No Time” Oezdemir
- Johnny Walker
- Darko Stosic
- Alton “The Bo-Man” Cunningham
- Alonzo Menifield
- Kenneth “Ymir” Bergh
- William “Knightmare” Knight
- Khadis Ibragimov
- Jim “The Brute” Crute
- Roman “Caucasian Wolf” Dolidze
- Jiri “Denisa” Prochazka
- Magomed Ankalaev
Middleweight
- Oskar “Imadło” Piechota
- Israel “The Last Stylebender” Adesanya
- Karl “Baby K” Roberson
- Jack “The Joker” Hermansson
- Punahele “Story Time” Soriano
- Deron Winn
- “Tombstone” Taylor Johnson
- Rodolfo “The Black Belt Hunter” Viera
- Duško Todorović
- Roman Kopylov
- Antônio Arroyo
- Fabian “The Assassin” Edwards
- Makhmud “Makh” Muradov
- Kevin “Trailblazer” Holland
- Kyle Daukaus
- Dustin Stoltzfus
Welterweight
- Darren “The Gorilla” Till
- Elizeu “Capoeira” Zaleski dos Santos
- Siyar “The Great” Bahadurzada
- Geoff “Handz of Steel” Neal
- Vicente “The Silent Assassin” Luque
- “Curtious” Curtis Millender
- Zelim Imadaev
- Ismail “The Austrian Wonderboy” Naurdiev
- Yaroslav “Dynamo” Amosov
- Miguel “Caramel Thunder” Baeza
- Daniel “D-Rod” Rodriguez
- Shavkat “Nomad” Rakhmonov
- Ian “The Future” Garry
- Uros “The Serbian Samurai” Medic
- Khamzat “Borz” Chimaev
- “Magic” Matt Dixon
- Sean Brady
Lightweight
- Mairbek “Beckan” Taisumov
- “Violent Bob Ross” Luis Peña
- Dan “The Hangman” Hooker
- David Teymur
- Gregor “The Gift” Gillespie
- Alex Hernandez
- Devonte “King Kage” Smith
- Diego Ferreira
- Ottman “Bulldozer” Azaitar
- Omar Morales
- Joshua “Kuya” Culibao
- Mark “The Olympian” Madsen
- Jai “The Black Country Banger” Herbert
- Max Rohskopf
- Roman Bogatov
- Khama “The Deathstar” Worthy
Featherweight
- Alexander “The Great” Volkanovski
- Zabit “Zabeast” Magomedsharipov
- Julio Arce
- Kron Gracie
- “Super” Sodiq Yusuff
- Lance “The Tornado” Lawrence
- Lerone “The Miracle” Murphy
- “The Bermudez Triangle” Manny Bermudez
- Sean “The Sniper” Woodson
- “Hurricane” Shane Burgos
- Chase “The Teenage Dream” Hooper
- Nate “The Train” Landwehr
- Austin “Lights Out” Lingo
- “Downtown” TJ Brown
- “Thug Nasty” Bryce Mitchell
- Spike “The Alpha Ginger” Carlyle
- Herbert “The Blaze” Burns
- Justin “Guitar Hero” Jaynes
- TJ “The Truth” Laramie
- Ludovit “Lajos” Klein
Bantamweight
- “Sugar” Sean O’Malley
- Song “The Terminator” Yadong
- Petr “No Mercy” Yan
- Cory Sandhagen
- Nathaniel “The Prospect” Wood
- Grigory Popov
- Ricky Simón
- Gabriel “Gabito” Silva
- Desmond “The Tyrant” Torres
- Jack “Tank” Shore
- Ode “The Jamaican Sensation” Osbourne
- Rustam Kerimov
- Khusein “Lion” Askhabov
- Jack Cartwright
- Nathan “Mayhem” Maness
- Kevin “Quicksand” Natividad
Flyweight
- Deiveson “Dues da Guerra” Figueiredo
- Alex Perez
- Askar “Bullet” Askarov
- David “Undertaker” Dvorak
- Malcolm “X” Gordon