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| Name | Nickname | Division | Record | Status |
|---|---|---|---|---|
| Aaron Brink | Heavyweight | 26-26-0 (W-L-D) | Inactive | |
| Adam Wieczorek | “Siwy” | Heavyweight | 10-2-0 (W-L-D) | Inactive |
| Alan Baudot | “The Black Samourai” | Heavyweight | 8-3-0 (W-L-D) | Inactive |
| Alberta Cerra | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Aleksei Oleinik | “The Boa Constrictor” | Heavyweight | 60-17-1 (W-L-D) | Inactive |
| Alex Hunter | Heavyweight | 2-0-0 (W-L-D) | Inactive | |
| Alex Pereira | “Poatan” | Heavyweight | 13-4-0 (W-L-D) | Active |
| Alexander Soldatkin | Heavyweight | 14-4-0 (W-L-D) | Active | |
| Alexander Volkov | “Drago” | Heavyweight | 40-11-0 (W-L-D) | Active |
| Alexandr Romanov | “King Kong” | Heavyweight | 18-3-0 (W-L-D) | Inactive |
| Alexandre Dantas | “Cafe” | Heavyweight | 0-3-0 (W-L-D) | Inactive |
| Alistair Overeem | “The Demolition Man” | Heavyweight | 47-19-0 (W-L-D) | Inactive |
| Allen Crowder | “Pretty Boy” | Heavyweight | 10-4-0 (W-L-D) | Inactive |
| Allen Frye Jr. | “AJ” | Heavyweight | 6-1-0 (W-L-D) | Active |
| Alton Meeks | “Murda” | Heavyweight | 3-0-0 (W-L-D) | Inactive |
| Alvin Hines | “Goozie” | Heavyweight | 7-2-0 (W-L-D) | Active |
| Amir Aliakbari | Heavyweight | 10-1-0 (W-L-D) | Inactive | |
| Andre Roberts | Heavyweight | 14-2-1 (W-L-D) | Inactive | |
| Andreas Spang | Heavyweight | 9-3-0 (W-L-D) | Inactive | |
| Andrei Arlovski | “The Pit Bull” | Heavyweight | 34-24-0 (W-L-D) | Inactive |
| Ante Delija | “Walking Trouble” | Heavyweight | 26-8-0 (W-L-D) | Active |
| Anthony Hamilton | “Freight Train” | Heavyweight | 15-9-0 (W-L-D) | Inactive |
| Antoni Hardonk | “Mr. Wonderful” | Heavyweight | 8-6-0 (W-L-D) | Inactive |
| Antonio Silva | “Bigfoot” | Heavyweight | 19-12-1 (W-L-D) | Inactive |
| Arjan Singh Bhullar | Heavyweight | 9-1-0 (W-L-D) | Inactive | |
| Assuerio Silva | Heavyweight | 16-8-0 (W-L-D) | Inactive | |
| Augusto Sakai | Heavyweight | 16-5-1 (W-L-D) | Inactive | |
| Bas Rutten | Heavyweight | 28-4-1 (W-L-D) | Inactive | |
| Ben Rothwell | Heavyweight | 39-14-0 (W-L-D) | Inactive | |
| Ben Sosoli | “Combat Wombat” | Heavyweight | 7-3-0 (W-L-D) | Inactive |
| Bilyal Makhov | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Blagoy Ivanov | “Baga” | Heavyweight | 19-6-0 (W-L-D) | Inactive |
| Bobby Hoffman | “The Bad Seed” | Heavyweight | 36-10-1 (W-L-D) | Inactive |
| Bojan Mihajlovic | Heavyweight | 10-6-0 (W-L-D) | Inactive | |
| Brad Imes | Heavyweight | 13-7-0 (W-L-D) | Inactive | |
| Brad Kohler | Heavyweight | 12-15-0 (W-L-D) | Inactive | |
| Brando Pericic | “The Balkan Bear” | Heavyweight | 7-1-0 (W-L-D) | Active |
| Brandon Sayles | Heavyweight | 5-1-0 (W-L-D) | Active | |
| Brandon Vera | “The Truth” | Heavyweight | 15-7-0 (W-L-D) | Inactive |
| Braxton Smith | “The Beautiful Monster” | Heavyweight | 5-2-0 (W-L-D) | Inactive |
| Brendan Schaub | “Big Brown” | Heavyweight | 10-5-0 (W-L-D) | Inactive |
| Brian Johnston | Heavyweight | 5-5-0 (W-L-D) | Inactive | |
| Brock Lesnar | Heavyweight | 5-3-0 (W-L-D) | Inactive | |
| Cain Velasquez | Heavyweight | 14-3-0 (W-L-D) | Inactive | |
| Carlos Baretto | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Carlos Felipe | “Boi” | Heavyweight | 11-2-0 (W-L-D) | Inactive |
| Chad Johnson | Heavyweight | 6-2-0 (W-L-D) | Inactive | |
| Chandler Cole | Heavyweight | 10-4-0 (W-L-D) | Active | |
| Chase Gormley | Heavyweight | 14-6-0 (W-L-D) | Inactive | |
| Chase Sherman | “The Vanilla Gorilla” | Heavyweight | 16-12-0 (W-L-D) | Inactive |
| Cheick Kongo | Heavyweight | 27-10-2 (W-L-D) | Inactive | |
| Chi Lewis-Parry | Heavyweight | 7-0-1 (W-L-D) | Inactive | |
| Chris Barnett | “Beastboy” | Heavyweight | 23-10-0 (W-L-D) | Inactive |
| Chris Condo | Heavyweight | 0-1-0 (W-L-D) | Inactive | |
| Chris De La Rocha | Heavyweight | 5-3-0 (W-L-D) | Inactive | |
| Chris Tuchscherer | “The Crowbar” | Heavyweight | 21-4-0 (W-L-D) | Inactive |
| Christian Colombo | “Godzilla” | Heavyweight | 8-3-1 (W-L-D) | Inactive |
| Christian Morecraft | Heavyweight | 8-3-0 (W-L-D) | Inactive | |
| Christophe Midoux | “The French Hurricane” | Heavyweight | 9-5-0 (W-L-D) | Inactive |
| Ciryl Gane | “Bon Gamin” | Heavyweight | 14-2-0 (W-L-D) | Active |
| Cody East | “The Freight Train” | Heavyweight | 12-3-0 (W-L-D) | Inactive |
| Colin Robinson | “Big C” | Heavyweight | 10-12-0 (W-L-D) | Inactive |
| Coltin Cole | “The Truth” | Heavyweight | 4-5-0 (W-L-D) | Active |
| Cory Corbin | “Hamma” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Curtis Blaydes | “Razor” | Heavyweight | 19-6-0 (W-L-D) | Active |
| Cyril Asker | “Silverback” | Heavyweight | 9-4-0 (W-L-D) | Inactive |
| Damian Grabowski | “The Polish Pitbull” | Heavyweight | 20-5-0 (W-L-D) | Inactive |
| Dan Christison | “The Sandman” | Heavyweight | 20-7-0 (W-L-D) | Inactive |
| Dan Evensen | “The Viking” | Heavyweight | 11-4-0 (W-L-D) | Inactive |
| Dan Severn | “The Beast” | Heavyweight | 101-19-1 (W-L-D) | Inactive |
| Daniel Bobish | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Daniel Cormier | “DC” | Heavyweight | 22-3-0 (W-L-D) | Inactive |
| Daniel Gallemore | Heavyweight | 7-3-0 (W-L-D) | Inactive | |
| Daniel Omielanczuk | Heavyweight | 19-8-1 (W-L-D) | Inactive | |
| Daniel Spitz | “Daddy Long Legs” | Heavyweight | 6-3-0 (W-L-D) | Inactive |
| Danilo Suzart | Heavyweight | 9-2-0 (W-L-D) | Active | |
| Danylo Voievodkin | Heavyweight | 7-0-0 (W-L-D) | Inactive | |
| Darrill Schoonover | “The Boss” | Heavyweight | 14-8-0 (W-L-D) | Inactive |
| Dave Beneteau | Heavyweight | 6-5-1 (W-L-D) | Inactive | |
| Dave Herman | Heavyweight | 22-6-0 (W-L-D) | Inactive | |
| Denis Stojnic | “The Menace” | Heavyweight | 13-3-0 (W-L-D) | Inactive |
| Denzel Freeman | “Luke Fox” | Heavyweight | 7-2-0 (W-L-D) | Active |
| Derrick Lewis | “The Black Beast” | Heavyweight | 29-14-0 (W-L-D) | Active |
| Dion Staring | “Soldier” | Heavyweight | 35-14-0 (W-L-D) | Inactive |
| Dmitrei Stepanov | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Dmitrii Smoliakov | “The Lifeguard” | Heavyweight | 9-3-0 (W-L-D) | Inactive |
| Dmitry Poberezhets | Heavyweight | 24-5-1 (W-L-D) | Inactive | |
| Dmitry Sosnovskiy | Heavyweight | 11-0-0 (W-L-D) | Inactive | |
| Don Frye | “The Predator” | Heavyweight | 20-9-1 (W-L-D) | Inactive |
| Don'Tale Mayes | “Lord Kong” | Heavyweight | 11-9-0 (W-L-D) | Inactive |
| Duane Cason | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| Dustin Joynson | Heavyweight | 5-0-0 (W-L-D) | Active | |
| Dylan Potter | Heavyweight | 10-6-0 (W-L-D) | Inactive | |
| Eddie Sanchez | “The Manic Hispanic” | Heavyweight | 15-8-0 (W-L-D) | Inactive |
| Edivan Santos | Heavyweight | 12-3-1 (W-L-D) | Active | |
| Eduardo Neves | Heavyweight | 7-2-0 (W-L-D) | Active | |
| Elisha Ellison | “The Snack Panther” | Heavyweight | 5-3-0 (W-L-D) | Active |
| Eric Martin | Heavyweight | 0-1-0 (W-L-D) | Inactive | |
| Everett Sims | Heavyweight | 4-1-0 (W-L-D) | Inactive | |
| Fabiano Scherner | “Pegaleve” | Heavyweight | 11-10-0 (W-L-D) | Inactive |
| Fabricio Werdum | “Vai Cavalo” | Heavyweight | 24-9-1 (W-L-D) | Inactive |
| Felipe Franco | “Negão” | Heavyweight | 10-1-0 (W-L-D) | Active |
| Francis Ngannou | “The Predator” | Heavyweight | 17-3-0 (W-L-D) | Inactive |
| Frank Holland | “The Tank” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Frank Mir | Heavyweight | 18-11-0 (W-L-D) | Inactive | |
| Gable Steveson | Heavyweight | 4-0-0 (W-L-D) | Active | |
| Gabriel Gonzaga | “Napao” | Heavyweight | 17-11-0 (W-L-D) | Inactive |
| Gan McGee | “The Giant” | Heavyweight | 13-5-0 (W-L-D) | Inactive |
| Gary Goodridge | Heavyweight | 23-22-1 (W-L-D) | Inactive | |
| Geronimo dos Santos | “Mondragon” | Heavyweight | 39-19-0 (W-L-D) | Inactive |
| Giacomo Lemos | “The Viking” | Heavyweight | 6-0-0 (W-L-D) | Inactive |
| Gian Villante | Heavyweight | 17-14-0 (W-L-D) | Inactive | |
| Gilbert Aldana | “El Peligroso” | Heavyweight | 6-2-0 (W-L-D) | Inactive |
| Gilbert Yvel | “The Hurricane” | Heavyweight | 39-16-1 (W-L-D) | Inactive |
| Gokhan Saricam | Heavyweight | 12-2-0 (W-L-D) | Active | |
| Greg Hardy | “Prince of War” | Heavyweight | 7-5-0 (W-L-D) | Inactive |
| Greg Rebello | “Ribz” | Heavyweight | 24-8-0 (W-L-D) | Active |
| Greg Stott | Heavyweight | 0-1-0 (W-L-D) | Inactive | |
| Greg Velasco | Heavyweight | 6-1-0 (W-L-D) | Active | |
| Guilherme Pat | “Kong” | Heavyweight | 6-1-0 (W-L-D) | Active |
| Hamdy Abdelwahab | “The Hammer” | Heavyweight | 7-1-0 (W-L-D) | Inactive |
| Harry Moskowitz | Heavyweight | 6-12-0 (W-L-D) | Inactive | |
| Heath Herring | “The Texas Crazy Horse” | Heavyweight | 28-16-0 (W-L-D) | Inactive |
| Henrique Da Silva Lopes | Heavyweight | 5-2-0 (W-L-D) | Active | |
| Houston Dorr | Heavyweight | 1-2-0 (W-L-D) | Inactive | |
| Hugo Cunha | Heavyweight | 8-2-0 (W-L-D) | Inactive | |
| Hugo Duarte | Heavyweight | 6-3-0 (W-L-D) | Inactive | |
| Ian Freeman | “The Machine” | Heavyweight | 20-7-1 (W-L-D) | Inactive |
| Icho Larenas | Heavyweight | 6-5-0 (W-L-D) | Inactive | |
| Ilir Latifi | “The Sledgehammer” | Heavyweight | 17-9-0 (W-L-D) | Inactive |
| Jack May | “The Outlaw” | Heavyweight | 9-3-0 (W-L-D) | Inactive |
| Jailton Almeida | “Malhadinho” | Heavyweight | 22-5-0 (W-L-D) | Inactive |
| Jairzinho Rozenstruik | “Bigi Boy” | Heavyweight | 15-6-0 (W-L-D) | Inactive |
| Jake Collier | “The Prototype” | Heavyweight | 13-10-0 (W-L-D) | Active |
| Jamal Pogues | Heavyweight | 11-5-0 (W-L-D) | Inactive | |
| James Mulheron | “Juggernaut” | Heavyweight | 11-2-0 (W-L-D) | Inactive |
| James Toney | “Lights Out” | Heavyweight | 0-1-0 (W-L-D) | Inactive |
| Jared Rosholt | Heavyweight | 14-4-0 (W-L-D) | Inactive | |
| Jared Vanderaa | Heavyweight | 12-10-0 (W-L-D) | Inactive | |
| Jarjis Danho | “Man Mountain” | Heavyweight | 7-1-1 (W-L-D) | Inactive |
| Jeff Hughes | “Lights Out” | Heavyweight | 10-4-0 (1 NC) | Inactive |
| Jeff Monson | “The Snowman” | Heavyweight | 60-26-1 (W-L-D) | Inactive |
| Jhonata Diniz | Heavyweight | 9-2-0 (W-L-D) | Active | |
| Jim Mullen | Heavyweight | 0-2-0 (W-L-D) | Inactive | |
| Jimmy Lawson | Heavyweight | 4-2-0 (W-L-D) | Inactive | |
| Joe Charles | Heavyweight | 6-13-0 (W-L-D) | Inactive | |
| Joe Pardo | Heavyweight | 4-6-0 (W-L-D) | Inactive | |
| Joey Roberts | Heavyweight | 4-3-0 (W-L-D) | Inactive | |
| John Marsh | “The Bull” | Heavyweight | 8-7-0 (W-L-D) | Inactive |
| John-Olav Einemo | “The Viking” | Heavyweight | 6-3-0 (W-L-D) | Inactive |
| Jon Jones | “Bones” | Heavyweight | 28-1-0 (W-L-D) | Active |
| Jon Madsen | Heavyweight | 8-2-0 (W-L-D) | Inactive | |
| Jonathan Correa | “Puerto Rican Rambo” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Jonathan Wiezorek | “Lock N Load” | Heavyweight | 11-2-0 (W-L-D) | Inactive |
| Jordan Jackson | “The Super Saiyan” | Heavyweight | 0-0-0 (W-L-D) | Inactive |
| Jose Montanha da Silva | Heavyweight | 6-1-0 (W-L-D) | Active | |
| Josh Appelt | Heavyweight | 15-7-0 (W-L-D) | Active | |
| Josh Barnett | “The Warmaster” | Heavyweight | 35-8-0 (W-L-D) | Inactive |
| Josh Copeland | “Cuddly Bear” | Heavyweight | 12-4-0 (W-L-D) | Inactive |
| Josh Hendricks | “Heavy” | Heavyweight | 19-11-0 (W-L-D) | Inactive |
| Josh Hokit | Heavyweight | 10-0-0 (W-L-D) | Active | |
| Josh Parisian | Heavyweight | 15-8-0 (W-L-D) | Active | |
| Josh Schockman | “The War Hammer” | Heavyweight | 7-0-0 (W-L-D) | Inactive |
| Jovan Leka | Heavyweight | 11-2-0 (W-L-D) | Active | |
| Juan Adams | “The Kraken” | Heavyweight | 5-3-0 (W-L-D) | Inactive |
| Juan Espino | “El Guapo” | Heavyweight | 11-2-0 (W-L-D) | Inactive |
| Junior Albini | “Baby” | Heavyweight | 14-6-0 (W-L-D) | Inactive |
| Justin Eilers | Heavyweight | 19-7-1 (W-L-D) | Inactive | |
| Justin Frazier | “The Grizzlybear” | Heavyweight | 10-3-0 (W-L-D) | Inactive |
| Justin McCully | “The Nsane1” | Heavyweight | 11-5-2 (W-L-D) | Inactive |
| Justin Tafa | “Bad Man” | Heavyweight | 7-5-0 (1 NC) | Inactive |
| Justin Willis | “Big Pretty” | Heavyweight | 8-2-0 (W-L-D) | Inactive |
| Justin Wren | “The Viking” | Heavyweight | 13-2-0 (W-L-D) | Inactive |
| Karl Williams | Heavyweight | 10-2-0 (W-L-D) | Inactive | |
| Kazushi Sakuraba | Heavyweight | 26-17-1 (W-L-D) | Inactive | |
| Keifer Roberts | “Keif” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Keigo Kunihara | Heavyweight | 3-2-0 (W-L-D) | Inactive | |
| Kennedy Nzechukwu | “Chosen” | Heavyweight | 14-6-1 (W-L-D) | Active |
| Kerry Schall | “Meat Truck” | Heavyweight | 24-13-0 (W-L-D) | Inactive |
| Kevin Jordan | “The Shaman” | Heavyweight | 11-9-0 (W-L-D) | Inactive |
| Kevin Szaflarski | Heavyweight | 11-2-0 (W-L-D) | Active | |
| Kimbo Slice | Heavyweight | 4-2-0 (W-L-D) | Inactive | |
| Kimo Leopoldo | “Kimo” | Heavyweight | 10-7-1 (W-L-D) | Inactive |
| Konstantin Erokhin | “The Russian Bear” | Heavyweight | 9-3-0 (W-L-D) | Inactive |
| Kyle Noblitt | Heavyweight | 11-2-0 (W-L-D) | Active | |
| Lavar Johnson | “Big” | Heavyweight | 18-10-0 (W-L-D) | Inactive |
| Logan Greenhalgh | “Tank” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Lorenzo Hood | Heavyweight | 14-5-0 (W-L-D) | Active | |
| Louie Sutherland | “Vanilla Gorilla” | Heavyweight | 11-5-0 (W-L-D) | Active |
| Luis Henrique | “KLB” | Heavyweight | 10-5-0 (W-L-D) | Inactive |
| Lukasz Brzeski | “The Bull” | Heavyweight | 9-7-1 (W-L-D) | Inactive |
| Marcelo Golm | Heavyweight | 6-3-0 (W-L-D) | Inactive | |
| Marcin Tybura | “Tybur” | Heavyweight | 27-11-0 (W-L-D) | Active |
| Marcio Cruz | “Pe De Pano” | Heavyweight | 8-3-0 (W-L-D) | Inactive |
| Marco Ruas | Heavyweight | 9-4-2 (W-L-D) | Inactive | |
| Marcos Conrado Junior | Heavyweight | 0-0-0 (W-L-D) | Active | |
| Marcos Rogerio de Lima | “Pezao” | Heavyweight | 22-10-1 (W-L-D) | Inactive |
| Marcus Buchecha | Heavyweight | 5-3-1 (W-L-D) | Active | |
| Marcus Da Silviera | “Conan” | Heavyweight | 0-0-0 (W-L-D) | Inactive |
| Marcus Jones | “Big Baby” | Heavyweight | 4-2-0 (W-L-D) | Inactive |
| Marek Bujlo | “Bujdzilla” | Heavyweight | 6-1-0 (W-L-D) | Inactive |
| Mario Neto | “Sukata” | Heavyweight | 13-5-0 (W-L-D) | Inactive |
| Mario Pinto | Heavyweight | 12-0-0 (W-L-D) | Active | |
| Mark David Robinson | “White Rhino” | Heavyweight | 1-0-0 (W-L-D) | Inactive |
| Mark Godbeer | “The Hand Of” | Heavyweight | 13-4-0 (W-L-D) | Inactive |
| Mark Hunt | “Super Samoan” | Heavyweight | 13-14-1 (W-L-D) | Inactive |
| Mark Kerr | “The Smashing Machine” | Heavyweight | 15-11-0 (W-L-D) | Inactive |
| Martin Buday | “Badys” | Heavyweight | 16-2-0 (W-L-D) | Inactive |
| Martin Mishtaku | “Booth” | Heavyweight | 0-0-0 (W-L-D) | Inactive |
| Matt Mitrione | Heavyweight | 12-5-0 (W-L-D) | Inactive | |
| Maurice Greene | “The Crochet Boss” | Heavyweight | 9-7-0 (W-L-D) | Inactive |
| Maurice Smith | “Mo” | Heavyweight | 12-14-0 (W-L-D) | Inactive |
| Max Gimenis | Heavyweight | 6-2-0 (W-L-D) | Active | |
| Michal Martinek | “Blackbeard” | Heavyweight | 7-1-0 (W-L-D) | Active |
| Michel Batista | “El Panda” | Heavyweight | 4-1-0 (W-L-D) | Inactive |
| Mick Parkin | Heavyweight | 10-1-0 (W-L-D) | Inactive | |
| Mike Russow | Heavyweight | 15-3-0 (W-L-D) | Inactive | |
| Mike Wessel | “The Juggernaut” | Heavyweight | 15-8-0 (W-L-D) | Inactive |
| Minotauro Nogueira | Heavyweight | 34-10-1 (W-L-D) | Inactive | |
| Mirko Cro Cop | Heavyweight | 31-11-2 (W-L-D) | Inactive | |
| Mitchell Sipe | “The Sniper” | Heavyweight | 4-1-0 (W-L-D) | Active |
| Mohammed Usman | “The Motor” | Heavyweight | 12-4-0 (W-L-D) | Inactive |
| Mostapha Al Turk | Heavyweight | 6-6-0 (W-L-D) | Inactive | |
| Moti Horenstein | Heavyweight | 1-6-0 (W-L-D) | Inactive | |
| Nandor Guelmino | “The Hun” | Heavyweight | 11-5-1 (W-L-D) | Inactive |
| Nate Schroeder | Heavyweight | 11-10-0 (W-L-D) | Inactive | |
| Neil Grove | “Goliath” | Heavyweight | 12-8-1 (W-L-D) | Inactive |
| Neil Wain | “Old Skool” | Heavyweight | 13-4-0 (W-L-D) | Inactive |
| Oli Thompson | Heavyweight | 17-10-0 (W-L-D) | Inactive | |
| Oscar Cota | “Elevation” | Heavyweight | 11-3-0 (W-L-D) | Active |
| Parker Porter | Heavyweight | 14-9-0 (W-L-D) | Active | |
| Pat Barry | “HD” | Heavyweight | 8-7-0 (W-L-D) | Inactive |
| Patrick Smith | Heavyweight | 20-17-0 (W-L-D) | Inactive | |
| Paul Buentello | “The Headhunter” | Heavyweight | 35-17-0 (W-L-D) | Inactive |
| Pedro Rizzo | “The Rock” | Heavyweight | 20-11-0 (W-L-D) | Inactive |
| Pete Williams | “El Duro (The Hard One)” | Heavyweight | 12-6-0 (W-L-D) | Inactive |
| Phil De Fries | Heavyweight | 9-3-0 (W-L-D) | Inactive | |
| Przemyslaw Mysiala | Heavyweight | 0-0-0 (W-L-D) | Inactive | |
| RJ Harris | “The Hammer” | Heavyweight | 6-0-0 (W-L-D) | Active |
| Raphael Pessoa Nunes | “Bebezao” | Heavyweight | 10-2-0 (W-L-D) | Inactive |
| Ricardo Prasel | “Alemao” | Heavyweight | 10-2-0 (W-L-D) | Active |
| Ricco Rodriguez | Heavyweight | 53-25-0 (W-L-D) | Inactive | |
| Richard Jacobi | Heavyweight | 6-1-1 (W-L-D) | Active | |
| Richard Odoms | Heavyweight | 13-3-0 (W-L-D) | Inactive | |
| Rizvan Kuniev | Heavyweight | 13-3-1 (W-L-D) | Active | |
| Rob Broughton | “The Bear” | Heavyweight | 16-7-1 (W-L-D) | Inactive |
| Robelis Despaigne | “The Big Boy” | Heavyweight | 5-2-0 (W-L-D) | Inactive |
| Roberto Traven | Heavyweight | 6-4-1 (W-L-D) | Inactive | |
| Rodrigo Nascimento | “Ze' Colmeia” | Heavyweight | 11-3-0 (W-L-D) | Inactive |
| Rolles Gracie | Heavyweight | 8-4-0 (W-L-D) | Inactive | |
| Ron Waterman | Heavyweight | 16-6-2 (W-L-D) | Inactive | |
| Roque Martinez | Heavyweight | 15-8-2 (W-L-D) | Inactive | |
| Roy Nelson | “Big Country” | Heavyweight | 22-14-0 (W-L-D) | Inactive |
| Ruan Potts | “Fangzz” | Heavyweight | 11-6-0 (W-L-D) | Inactive |
| Ruslan Magomedov | “Leopard” | Heavyweight | 14-1-0 (W-L-D) | Inactive |
| Ryan Spann | “Superman” | Heavyweight | 24-11-0 (W-L-D) | Active |
| Sam Fulton | Heavyweight | 0-2-0 (W-L-D) | Inactive | |
| Satoshi Honma | Heavyweight | 4-6-3 (W-L-D) | Inactive | |
| Scott Adams | Heavyweight | 8-1-0 (W-L-D) | Inactive | |
| Scott Ferrozzo | Heavyweight | 4-2-0 (W-L-D) | Inactive | |
| Scott Junk | Heavyweight | 8-3-1 (W-L-D) | Inactive | |
| Sean Alvarez | Heavyweight | 4-3-0 (W-L-D) | Inactive | |
| Sean Gannon | “The Cannon” | Heavyweight | 2-1-0 (W-L-D) | Inactive |
| Sean McCorkle | “Big Sexy” | Heavyweight | 17-7-0 (W-L-D) | Inactive |
| Sean Sharaf | “The Smoke” | Heavyweight | 4-2-0 (W-L-D) | Active |
| Semmy Schilt | “The Viking” | Heavyweight | 26-14-1 (W-L-D) | Inactive |
| Sergei Pavlovich | Heavyweight | 21-3-0 (W-L-D) | Active | |
| Serghei Spivac | “Polar Bear” | Heavyweight | 18-6-0 (W-L-D) | Active |
| Shamil Abdurakhimov | “Abrek” | Heavyweight | 20-8-0 (W-L-D) | Inactive |
| Shamil Gaziev | Heavyweight | 14-3-0 (W-L-D) | Active | |
| Shane Carwin | Heavyweight | 12-2-0 (W-L-D) | Inactive | |
| Shane Del Rosario | Heavyweight | 11-2-0 (W-L-D) | Inactive | |
| Shawn Jordan | “The Savage” | Heavyweight | 19-8-0 (W-L-D) | Inactive |
| Shawn Teed | Heavyweight | 5-2-0 (W-L-D) | Inactive | |
| Shelton Graves | “The Gravedigger” | Heavyweight | 7-3-0 (W-L-D) | Inactive |
| Sherman Pendergarst | “The Tank” | Heavyweight | 11-18-0 (W-L-D) | Inactive |
| Sione Latu | Heavyweight | 1-0-0 (W-L-D) | Inactive | |
| Slim Trabelsi | Heavyweight | 5-0-0 (W-L-D) | Inactive | |
| Soa Palelei | “The Hulk” | Heavyweight | 22-5-0 (W-L-D) | Inactive |
| Stefan Struve | “Skyscraper” | Heavyweight | 33-13-0 (W-L-D) | Inactive |
| Steve Judson | Heavyweight | 0-2-0 (W-L-D) | Inactive | |
| Steven Asplund | “Concrete” | Heavyweight | 7-2-0 (W-L-D) | Active |
| Stipe Miocic | Heavyweight | 20-5-0 (W-L-D) | Inactive | |
| Tai Tuivasa | “Bam Bam” | Heavyweight | 15-10-0 (W-L-D) | Inactive |
| Tallison Teixeira | “Xicao” | Heavyweight | 9-2-0 (W-L-D) | Active |
| Tank Abbott | “Tank” | Heavyweight | 8-10-0 (W-L-D) | Inactive |
| Tanner Boser | “The Bulldozer” | Heavyweight | 22-11-1 (W-L-D) | Active |
| Tebaris Gordon | “Boom” | Heavyweight | 3-1-0 (W-L-D) | Inactive |
| Tedd Williams | Heavyweight | 7-1-0 (W-L-D) | Inactive | |
| Testy Test | “Testy” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Thomas Petersen | “The Train” | Heavyweight | 11-4-0 (W-L-D) | Active |
| Tim Hague | “The Thrashing Machine” | Heavyweight | 21-13-0 (W-L-D) | Inactive |
| Tim Lajcik | “The Bohemian” | Heavyweight | 7-6-1 (W-L-D) | Inactive |
| Tim Sylvia | “The Maine-iac” | Heavyweight | 31-10-0 (W-L-D) | Inactive |
| Timothy Johnson | Heavyweight | 12-4-0 (W-L-D) | Inactive | |
| Timothy Thomas | “The Gorilla” | Heavyweight | 0-0-0 (W-L-D) | Active |
| Todd Duffee | Heavyweight | 9-3-0 (1 NC) | Inactive | |
| C Tom Aspinall | Heavyweight | 15-3-0 (2 NC) | Active | |
| Tom Murphy | Heavyweight | 8-0-0 (W-L-D) | Inactive | |
| Tony Halme | Heavyweight | 0-4-0 (W-L-D) | Inactive | |
| Tra Telligman | “Trauma” | Heavyweight | 7-5-1 (W-L-D) | Inactive |
| Travis Browne | “Hapa” | Heavyweight | 18-7-1 (W-L-D) | Active |
| Travis Fulton | Heavyweight | 253-53-10 (W-L-D) | Inactive | |
| Tsuyoshi Kosaka | “TK” | Heavyweight | 18-9-1 (W-L-D) | Inactive |
| Tyrell Fortune | Heavyweight | 18-3-0 (W-L-D) | Active | |
| Valter Walker | “The Clean Monster” | Heavyweight | 15-1-0 (W-L-D) | Active |
| Viktor Pesta | Heavyweight | 10-4-0 (W-L-D) | Inactive | |
| Vinicius Queiroz | “Spartan” | Heavyweight | 8-4-0 (W-L-D) | Inactive |
| Vitor Petrino | Heavyweight | 14-2-0 (W-L-D) | Active | |
| Wade Shipp | “The Nightmare” | Heavyweight | 11-5-0 (W-L-D) | Inactive |
| Waldo Cortes Acosta | “Salsa Boy” | Heavyweight | 17-3-0 (W-L-D) | Active |
| Walt Harris | “The Big Ticket” | Heavyweight | 13-10-0 (W-L-D) | Inactive |
| Wes Sims | “The Project” | Heavyweight | 24-14-1 (W-L-D) | Inactive |
| Wesley Correira | “Cabbage” | Heavyweight | 20-16-0 (W-L-D) | Inactive |
| Yorgan De Castro | “The Mad Titan” | Heavyweight | 6-3-0 (W-L-D) | Inactive |
| Zane Frazier | “Nasty” | Heavyweight | 4-11-0 (W-L-D) | Inactive |
| Zu Anyanwu | “8th Wonder” | Heavyweight | 14-5-0 (W-L-D) | Inactive |