Fighters: J
Last names starting with J, including retired fighters.
- Yves Jabouin “Tiger”20-11-0Bantamweight
- Damon Jackson “The Leech”23-9-1 (1 NC)Lightweight
- Eugene Jackson “The Wolf”15-9-1Middleweight
- Jeremy Jackson “Scorpion”0-2-0Welterweight
- Kevin Jackson4-2-0Middleweight
- Mike Jackson “The Truth”2-2-0 (1 NC)Welterweight
- Montel Jackson “Quik”16-4-0Bantamweight
- Quinton Jackson “Rampage”8-5-0Light Heavyweight
- Dustin Jacoby “The Hanyak”22-10-1Light Heavyweight
- Justin James0-1-0Lightweight
- Virna Jandiroba “Carcara”23-4-0Women's Strawweight
- Ryan Janes10-3-0Middleweight
- Milos Janicic “The Cobra”19-4-0Lightweight
- Brock Jardine “The Machine”0-2-0Welterweight
- Keith Jardine “The Dean of Mean”17-11-2Light Heavyweight
- Rony Jason18-12-0 (1 NC)Featherweight
- Jasmine Jasudavicius16-4-0Women's Flyweight
- Yazmin Jauregui12-2-0Women's Strawweight
- Justin Jaynes “The Guitar Hero”18-11-0Featherweight
- Joanna Jedrzejczyk16-5-0Women's Strawweight
- Brandon Jenkins “The Human Highlight Reel”0-2-0Lightweight
- Jack Jenkins “Phar”4-3-0Featherweight
- Trent Jenkins0-1-0Open Weight
- Steve Jennum2-1-03 Tournament
- Ryan Jensen21-8-0Middleweight
- Chan-Mi Jeon0-2-0Women's Strawweight
- Maciej Jewtuszko “Irokez”0-1-0Lightweight
- Ronald Jhun “The Machine Gun”0-1-0Welterweight
- Baergeng Jieleyisi0-1-0Bantamweight
- Ryan Jimmo “The Big Deal”19-5-0Light Heavyweight
- Li Jingliang “The Leech”19-9-0Welterweight
- Xiong Jingnan “The Panda”19-4-0Women's Strawweight
- Sung Bin Jo “Korean Falcon”0-1-0Featherweight
- Brett Johns “The Pikey”21-6-0Bantamweight
- Miles Johns “Chapo”16-5-0 (1 NC)Featherweight
- Phil Johns0-1-0Welterweight
- Anthony Johnson “Rumble”23-6-0Light Heavyweight
- Charles Johnson “InnerG”20-9-0Flyweight
- DaMarques Johnson “Darkness”16-15-0Welterweight
- Dashon Johnson “Flyboy”0-2-0Featherweight
- Demetrious Johnson “Mighty Mouse”25-4-1Flyweight
- Donte Johnson “Lock Jaw”3-0-0Middleweight
- Jordan Johnson12-2-1Middleweight
- Jose Johnson “Zhakwarius”1-3-0Flyweight
- Kajan Johnson “Ragin'”23-13-1Lightweight
- Lavar Johnson “Big”18-10-0Heavyweight
- Michael Johnson “The Menace”24-20-0Lightweight
- Timothy Johnson18-13-0Heavyweight
- Benjamin Donovan Johnston0-1-0Middleweight
- Brian Johnston6-6-0Heavyweight
- Liana Jojua “She Wolf”8-6-0Women's Flyweight
- Daniel Jolly “The Werewolf of Texas”0-2-0Light Heavyweight
- Jon Jones “Bones”28-1-0 (1 NC)Heavyweight
- Justin Jones “Black Dynamite”0-2-0Middleweight
- Marcus Jones “The Darkness”0-1-0Heavyweight
- Mason Jones “The Dragon”18-3-0 (1 NC)Lightweight
- Paul Jones1-1-0Middleweight
- Trevin Jones “5 Star”14-13-0 (1 NC)Bantamweight
- Jocelyn Jones-Lybarger0-3-0Women's Strawweight
- Joe Jordan0-1-0Catch Weight
- Kevin Jordan “The Shaman”0-2-0Heavyweight
- Shawn Jordan “The Savage”19-9-0Heavyweight
- Ivan Jorge “Batman”27-8-0Lightweight
- Scott Jorgensen “Young Guns”15-12-0Bantamweight
- Jeff Joslin “The Inferno”0-1-0Welterweight
- Krzysztof Jotko30-6-0 (1 NC)Middleweight
- Alan Jouban “Brahma”17-7-0Welterweight
- Charles Jourdain “Air”18-9-1Bantamweight
- Louis Jourdain “The Mad Prince”0-1-0Bantamweight
- Kevin Jousset “Air”10-5-0Welterweight
- Allen Frye Jr. “AJ”1-1-0Heavyweight
- Carlo Pedersoli Jr. “Semento”14-5-0Welterweight
- Khalil Rountree Jr.14-7-0 (1 NC)Light Heavyweight
- Lance Gibson Jr. “Fearless”1-1-0Lightweight
- Raul Rosas Jr. “El Nino Problema”13-1-0Bantamweight
- Silvana Gomez Juarez “La Malvada”12-6-0Women's Strawweight
- Anshul Jubli “King of Lions”7-2-0Lightweight
- Carli Judice “Crispy”4-1-0Women's Flyweight
- Steve Judson0-2-0Heavyweight
- Luke Jumeau “The Jedi”13-5-0Welterweight
- Chan Sung Jung “The Korean Zombie”17-8-0Featherweight
- Da Woon Jung “Sseda”15-7-1Light Heavyweight
- Antonio Carlos Junior “Cara de Sapato”19-6-0 (2 NC)Middleweight
- Marcio Alexandre Junior “Lyoto”0-3-0Welterweight
- Scott Junk0-1-0Heavyweight
- Myles Jury “Fury”19-6-0Featherweight
- Cristiane Justino “Cyborg”30-2-0 (1 NC)Women's Featherweight