| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Benji | Radach | Razor | 5' 10" | 185 lbs. | -- | Orthodox | 21 | 7 | 0 | |
| Jordan | Radev | 5' 7" | 185 lbs. | -- | Southpaw | 23 | 5 | 0 | ||
| Charles | Radtke | Chuck Buffalo | 5' 9" | 170 lbs. | 72.0" | Orthodox | 10 | 4 | 0 | |
| Loik | Radzhabov | The Tajik Tank | 5' 11" | 155 lbs. | 69.0" | Orthodox | 18 | 6 | 1 | |
| Gilbert | Rael | 5' 8" | 155 lbs. | -- | 1 | 3 | 0 | |||
| Josh | Rafferty | 6' 0" | 170 lbs. | -- | Orthodox | 9 | 8 | 0 | ||
| Amir | Rahnavardi | 6' 0" | 205 lbs. | -- | Orthodox | 11 | 10 | 0 | ||
| Ricky | Rainey | The Sniper | 6' 1" | 170 lbs. | 77.0" | Switch | 12 | 6 | 0 | |
| Shavkat | Rakhmonov | Nomad | 6' 1" | 170 lbs. | 77.0" | Orthodox | 18 | 0 | 0 | |
| Sora | Rakhmonova | -- | 125 lbs. | -- | 4 | 1 | 0 | |||
| Aleksandar | Rakic | Rocket | 6' 4" | 205 lbs. | 78.0" | Orthodox | 14 | 5 | 0 | |
| Jessica | Rakoczy | The Ragin' | 5' 7" | 115 lbs. | -- | Orthodox | 1 | 5 | 0 | |
| Zygimantas | Ramaska | 5' 11" | 145 lbs. | 71.0" | Orthodox | 9 | 3 | 0 | ||
| Thomas | Ramirez | 6' 1" | 410 lbs. | -- | Sideways | 0 | 1 | 0 | ||
| Hector | Ramirez | Sick Dog | 6' 0" | 205 lbs. | -- | Orthodox | 10 | 6 | 1 | |
| Matt | Ramirez | The Machine | 5' 5" | 125 lbs. | -- | 2 | 3 | 0 | ||
| Steve | Ramirez | 5' 7" | 125 lbs. | -- | 5 | 2 | 0 | |||
| Amador | Ramirez | -- | 135 lbs. | -- | 5 | 4 | 0 | |||
| Mitch | Ramirez | 5' 11" | 155 lbs. | 71.0" | Orthodox | 8 | 2 | 0 | ||
| Andrew | Ramm | The | 6' 1" | 160 lbs. | -- | 4 | 4 | 0 | ||
| Ian | Rammel | 6' 0" | 185 lbs. | -- | 7 | 8 | 0 | |||
| Luis | Ramos | Beicao | 5' 8" | 170 lbs. | -- | Orthodox | 20 | 10 | 2 | |
| Ricardo | Ramos | 5' 9" | 145 lbs. | 72.0" | Orthodox | 17 | 6 | 0 | ||
| Davi | Ramos | Tasmanian Devil | 5' 6" | 155 lbs. | 70.0" | Orthodox | 10 | 4 | 0 | |
| Dorian | Ramos | 5' 8" | 145 lbs. | 70.0" | Orthodox | 8 | 3 | 0 | ||
| Vernon | Ramos Ho | 5' 6" | 170 lbs. | -- | Orthodox | 3 | 1 | 0 | ||
| Kevin | Randleman | The Monster | 5' 10" | 205 lbs. | -- | Orthodox | 17 | 16 | 0 | |
| Raou | Raou | 5' 8" | 195 lbs. | -- | Orthodox | 0 | 1 | 0 | ||
| Mitch | Raposo | 5' 5" | 125 lbs. | 64.0" | Switch | 9 | 2 | 0 | ||
| Hussain | Rasouli | 5' 6" | 135 lbs. | -- | 2 | 3 | 0 | |||
| David | Rasouri | 5' 7" | 155 lbs. | -- | 2 | 3 | 0 | |||
| Ed | Ratcliff | 9mm | 5' 10" | 155 lbs. | 71.0" | Orthodox | 7 | 3 | 0 | |
| Bec | Rawlings | Rowdy | 5' 6" | 125 lbs. | 64.0" | Orthodox | 7 | 8 | 0 | |
| Gideon | Ray | 5' 10" | 185 lbs. | -- | Southpaw | 17 | 15 | 1 | ||
| Joe | Ray | -- | 170 lbs. | -- | 13 | 0 | 0 | |||
| Stevie | Ray | Braveheart | 5' 10" | 155 lbs. | 70.0" | Southpaw | 23 | 9 | 0 | |
| Keenan | Raymond | -- | 165 lbs. | -- | 3 | 3 | 0 | |||
| Iony | Razafiarison | 5' 3" | 145 lbs. | -- | 2 | 1 | 0 | |||
| Abdul | Razak Alhassan | 5' 10" | 185 lbs. | 73.0" | Orthodox | 12 | 6 | 0 | ||
| Antony | Rea | Wild Thing | 6' 0" | 205 lbs. | -- | Orthodox | 33 | 15 | 0 | |
| Mateusz | Rebecki | 5' 7" | 155 lbs. | 66.0" | Southpaw | 20 | 2 | 0 | ||
| Rafael | Rebello | Rafinha | 5' 5" | 135 lbs. | 67.0" | Orthodox | 9 | 4 | 0 | |
| Greg | Rebello | Ribz | 6' 0" | 240 lbs. | 73.0" | Southpaw | 24 | 8 | 0 | |
| Paul | Redmond | Redser | 5' 10" | 145 lbs. | -- | Orthodox | 12 | 7 | 0 | |
| Dennis | Reed | -- | 205 lbs. | -- | Orthodox | 45 | 62 | 1 | ||
| Karl | Reed | No Worries | 6' 3" | 205 lbs. | 78.0" | Orthodox | 6 | 1 | 0 | |
| Elise | Reed | 5' 3" | 115 lbs. | 63.0" | Orthodox | 8 | 4 | 0 | ||
| John | Reedy | The Wild Child | 5' 8" | 155 lbs. | -- | 11 | 6 | 0 | ||
| Johnny | Rees | The Hater Hurter | 6' 0" | 170 lbs. | -- | Orthodox | 13 | 5 | 0 | |
| James | Reese | JP | 5' 9" | 155 lbs. | -- | 11 | 10 | 0 | ||
| Zachary | Reese | Savage | 6' 4" | 185 lbs. | 77.0" | Switch | 8 | 1 | 0 | |
| Stephen | Regman | 5' 11" | 185 lbs. | 76.0" | Orthodox | 9 | 4 | 0 | ||
| Chad | Reiner | The Grinder | 5' 11" | 170 lbs. | -- | Orthodox | 33 | 18 | 0 | |
| Jason | Reinhardt | 5' 6" | 135 lbs. | -- | Orthodox | 20 | 3 | 0 | ||
| Wilson | Reis | 5' 4" | 125 lbs. | 65.0" | Southpaw | 23 | 10 | 0 | ||
| Ben | Reiter | The Hunter | 6' 3" | 185 lbs. | -- | 17 | 2 | 1 | ||
| Goran | Reljic | 6' 3" | 205 lbs. | 81.0" | Southpaw | 15 | 8 | 0 | ||
| Leigh | Remedios | Bulldog | 5' 7" | 155 lbs. | -- | Orthodox | 18 | 10 | 2 | |
| Paulo | Renato Junior | 6' 0" | 205 lbs. | 73.0" | Orthodox | 12 | 3 | 0 | ||
| Chance | Rencountre | Black Eagle | 6' 2" | 170 lbs. | 75.0" | Southpaw | 14 | 4 | 0 | |
| Montserrat | Rendon | Monster | 5' 8" | 135 lbs. | 68.0" | Orthodox | 6 | 1 | 0 | |
| Marion | Reneau | The Belizean Bruiser | 5' 6" | 135 lbs. | 68.0" | Orthodox | 9 | 8 | 1 | |
| Solomon | Renfro | The Black Dragon | 5' 9" | 170 lbs. | 72.0" | Switch | 8 | 2 | 0 | |
| John | Renken | The Saint | 6' 0" | 190 lbs. | -- | Orthodox | 18 | 28 | 4 | |
| Herman | Renting | 6' 0" | 215 lbs. | -- | Switch | 1 | 3 | 0 | ||
| Marco Polo | Reyes | 5' 11" | 155 lbs. | 71.0" | Orthodox | 8 | 7 | 0 | ||
| Dominick | Reyes | The Devastator | 6' 4" | 205 lbs. | 77.0" | Southpaw | 13 | 4 | 0 | |
| Alex | Reyes | The Executioner | 5' 11" | 155 lbs. | 73.0" | Orthodox | 13 | 5 | 0 | |
| Kyle | Reyes | Boom | 5' 8" | 145 lbs. | -- | 15 | 7 | 0 | ||
| Victor | Reyna | Kelevra | 5' 11" | 170 lbs. | 74.0" | Southpaw | 11 | 5 | 0 | |
| Gaston | Reyno | Tonga | 6' 0" | 145 lbs. | -- | 6 | 2 | 0 | ||
| Johnny | Rhodes | 6' 0" | 210 lbs. | -- | Orthodox | 2 | 1 | 0 | ||
| Mike | Rhodes | Biggie | 6' 1" | 170 lbs. | 74.0" | Orthodox | 10 | 5 | 0 | |
| Lucrezia | Ria | 5' 6" | 125 lbs. | -- | Orthodox | 8 | 2 | 0 | ||
| Amanda | Ribas | 5' 3" | 115 lbs. | 66.0" | Orthodox | 12 | 5 | 0 | ||
| Vitor | Ribeiro | Shaolin | 5' 8" | 154 lbs. | -- | Orthodox | 20 | 5 | 0 | |
| Will | Ribeiro | 5' 8" | 135 lbs. | -- | Orthodox | 10 | 2 | 0 | ||
| Claudio | Ribeiro | 6' 1" | 185 lbs. | 77.0" | Orthodox | 11 | 5 | 0 | ||
| Brendson | Ribeiro | The Gorilla | 6' 3" | 205 lbs. | 81.0" | Orthodox | 16 | 7 | 0 | |
| Esteban | Ribovics | El Gringo | 5' 10" | 155 lbs. | 69.0" | Orthodox | 14 | 1 | 0 | |
| Mike | Ricci | The Martian | 6' 0" | 155 lbs. | 76.0" | Southpaw | 11 | 5 | 0 | |
| Alex | Ricci | 5' 11" | 155 lbs. | -- | Orthodox | 10 | 5 | 0 | ||
| Tabatha | Ricci | Baby Shark | 5' 1" | 115 lbs. | 61.0" | Orthodox | 11 | 2 | 0 | |
| Matt | Ricehouse | -- | 155 lbs. | -- | 6 | 1 | 0 | |||
| John | Richard | -- | 205 lbs. | -- | 3 | 5 | 1 | |||
| Rex | Richards | 6' 5" | 265 lbs. | -- | 7 | 2 | 0 | |||
| Mike | Richman | The Marine | 5' 8" | 135 lbs. | -- | 18 | 7 | 0 | ||
| Dave | Rickels | The Caveman | 5' 11" | 155 lbs. | -- | 18 | 4 | 0 | ||
| Haisam | Rida | -- | -- | -- | 0 | 0 | 0 | |||
| Brad | Riddell | Quake | 5' 7" | 155 lbs. | 71.0" | Orthodox | 10 | 4 | 0 | |
| Matthew | Riddle | Deep Waters | 6' 1" | 170 lbs. | 76.0" | Southpaw | 8 | 3 | 0 | |
| Joe | Riggs | Diesel | 6' 0" | 185 lbs. | 70.0" | Southpaw | 44 | 17 | 0 | |
| Jeremiah | Riggs | 6' 0" | 185 lbs. | -- | 7 | 8 | 0 | |||
| Aaron | Riley | 5' 8" | 155 lbs. | 69.0" | Southpaw | 30 | 14 | 1 | ||
| Jason | Riley | The Juggernaut | 6' 6" | 245 lbs. | -- | 10 | 7 | 0 | ||
| Luke | Riley | -- | 145 lbs. | -- | 9 | 0 | 0 | |||
| Moise | Rimbon | Swamp | 5' 10" | 205 lbs. | -- | Orthodox | 23 | 11 | 3 | |
| Jordan | Rinaldi | All Day | 5' 10" | 145 lbs. | 72.0" | Orthodox | 14 | 7 | 0 | |
| Nick | Ring | The Promise | 6' 0" | 185 lbs. | 74.0" | Southpaw | 14 | 4 | 0 | |
| Robbie | Ring | Razor | 5' 9" | 145 lbs. | 68.0" | Orthodox | 6 | 1 | 0 | |
| Mike | Rio | The Wolverine | 5' 10" | 155 lbs. | 70.0" | Orthodox | 10 | 5 | 0 | |
| Albert | Rios | 5' 8" | 145 lbs. | -- | 13 | 6 | 0 | |||
| Rafael | Rios | -- | 150 lbs. | -- | 4 | 2 | 0 | |||
| Maria | Rios | 5' 5" | 125 lbs. | -- | 2 | 3 | 0 | |||
| Shannon | Ritch | The Cannon | 5' 9" | 190 lbs. | -- | Orthodox | 56 | 83 | 0 | |
| Diego | Rivas | Pitbull | 5' 8" | 145 lbs. | 69.0" | Orthodox | 10 | 2 | 0 | |
| Jorge | Rivera | El Conquistador | 6' 1" | 185 lbs. | 73.0" | Orthodox | 20 | 9 | 0 | |
| Dante | Rivera | 6' 1" | 185 lbs. | -- | Southpaw | 16 | 7 | 0 | ||
| Mario | Rivera | 5' 10" | 170 lbs. | -- | 6 | 8 | 0 | |||
| Francisco | Rivera | Cisco | 5' 8" | 135 lbs. | 70.0" | Orthodox | 11 | 7 | 0 | |
| Jonathan | Rivera | -- | 155 lbs. | -- | 4 | 2 | 0 | |||
| Jimmie | Rivera | El Terror | 5' 4" | 135 lbs. | 68.0" | Orthodox | 23 | 5 | 0 | |
| Irwin | Rivera | The Beast | 5' 6" | 135 lbs. | 67.0" | Southpaw | 10 | 6 | 0 | |
| Jerome | Rivera | Renegade | 5' 10" | 125 lbs. | 72.0" | Southpaw | 10 | 6 | 0 | |
| Nicdali | Rivera-Calanoc | The Night Queen | 5' 3" | 105 lbs. | -- | 9 | 10 | 0 | ||
| Pedro | Rizzo | The Rock | 6' 1" | 241 lbs. | -- | Orthodox | 20 | 11 | 0 | |
| Theo | Rlayang | Jungle King | 5' 7" | 145 lbs. | 65.0" | Orthodox | 5 | 1 | 0 | |
| Justin | Robbins | 5' 5" | 135 lbs. | -- | 14 | 18 | 1 | |||
| Kali | Robbins | Pop Tart | 5' 3" | 115 lbs. | 63.0" | Orthodox | 6 | 3 | 0 | |
| Karl | Roberson | Baby K | 6' 1" | 205 lbs. | 74.0" | Southpaw | 9 | 6 | 0 | |
| Andre | Roberts | The Chief | 6' 2" | 345 lbs. | -- | Orthodox | 14 | 2 | 1 | |
| David | Roberts | 6' 1" | 170 lbs. | -- | Orthodox | 5 | 8 | 0 | ||
| Joey | Roberts | 6' 2" | 200 lbs. | -- | 4 | 3 | 0 | |||
| Tyrone | Roberts | Native Warrior | 5' 9" | 185 lbs. | -- | Orthodox | 43 | 12 | 1 | |
| Ryan | Roberts | 5' 6" | 155 lbs. | -- | Orthodox | 21 | 12 | 1 | ||
| Taylor | Roberts | 5' 11" | 170 lbs. | -- | 3 | 12 | 0 | |||
| Daniel | Roberts | Ninja | 5' 10" | 170 lbs. | 74.0" | Southpaw | 15 | 7 | 0 | |
| Buddy | Roberts | 6' 2" | 185 lbs. | -- | Orthodox | 12 | 3 | 0 | ||
| Danny | Roberts | Hot Chocolate | 6' 1" | 170 lbs. | 74.0" | Southpaw | 18 | 8 | 0 | |
| Roosevelt | Roberts | The Predator | 6' 2" | 155 lbs. | 73.0" | Orthodox | 12 | 6 | 0 | |
| Kenny | Robertson | 5' 10" | 170 lbs. | 74.0" | Orthodox | 15 | 5 | 0 | ||
| Gillian | Robertson | The Savage | 5' 5" | 115 lbs. | 63.0" | Orthodox | 15 | 8 | 0 | |
| Chad | Robichaux | Robo | 5' 4" | 135 lbs. | -- | 13 | 2 | 0 | ||
| Mark | Robinson | White Rhino | 6' 0" | 265 lbs. | -- | Orthodox | 1 | 0 | 0 | |
| Colin | Robinson | Big C | 6' 4" | 243 lbs. | -- | Orthodox | 10 | 12 | 0 | |
| Alvin | Robinson | 5' 9" | 155 lbs. | 68.0" | Southpaw | 15 | 9 | 0 | ||
| Damonte | Robinson | 6' 0" | 155 lbs. | 77.0" | 6 | 1 | 1 | |||
| Vagner | Rocha | Ceara | 5' 10" | 155 lbs. | 73.0" | Orthodox | 14 | 4 | 0 | |
| Carlos Eduardo | Rocha | Ta Danado | 5' 10" | 170 lbs. | 73.0" | Orthodox | 9 | 4 | 0 | |
| Pedro | Rocha | -- | -- | -- | 1 | 0 | 0 | |||
| Lucas | Rocha | Fenomeno | 5' 3" | 125 lbs. | 64.0" | Orthodox | 17 | 2 | 0 | |
| Keith | Rockel | Rock | 6' 0" | 185 lbs. | -- | Orthodox | 12 | 4 | 1 | |
| Luke | Rockhold | 6' 3" | 185 lbs. | 77.0" | Southpaw | 16 | 6 | 0 | ||
| Kevin | Roddy | K-Rod | 5' 11" | 145 lbs. | -- | 15 | 16 | 1 | ||
| Gregory | Rodrigues | Robocop | 6' 3" | 185 lbs. | 75.0" | Orthodox | 16 | 5 | 0 | |
| Kleydson | Rodrigues | KR | 5' 5" | 135 lbs. | 67.0" | Orthodox | 8 | 4 | 0 | |
| Paul | Rodriguez | 5' 7" | 155 lbs. | -- | Orthodox | 10 | 9 | 2 | ||
| Ricco | Rodriguez | Suave | 6' 4" | 265 lbs. | -- | Orthodox | 53 | 25 | 0 | |
| Manuel | Rodriguez | Chalate | 5' 9" | 170 lbs. | -- | Orthodox | 11 | 5 | 0 | |
| Yair | Rodriguez | El Pantera | 5' 11" | 145 lbs. | 71.0" | Orthodox | 16 | 5 | 0 | |
| Mike | Rodriguez | Slo Mike | 6' 4" | 205 lbs. | 82.0" | Southpaw | 11 | 7 | 0 | |
| Marina | Rodriguez | 5' 6" | 115 lbs. | 65.0" | Orthodox | 17 | 5 | 2 | ||
| Daniel | Rodriguez | D-Rod | 6' 1" | 170 lbs. | 74.0" | Southpaw | 18 | 5 | 0 | |
| Ray | Rodriguez | The Judge | 5' 7" | 135 lbs. | 70.0" | Orthodox | 16 | 8 | 0 | |
| Ronaldo | Rodriguez | Lazy Boy | 5' 6" | 125 lbs. | 65.0" | Orthodox | 17 | 2 | 0 | |
| Drako | Rodriguez | 5' 8" | 135 lbs. | 69.0" | Orthodox | 7 | 3 | 0 | ||
| Victor | Rodriguez | Vicious | 5' 5" | 125 lbs. | 67.0" | Switch | 7 | 4 | 0 | |
| Piera | Rodriguez | La Fiera | 5' 3" | 115 lbs. | 63.0" | Orthodox | 9 | 2 | 0 | |
| Christian | Rodriguez | 5' 7" | 145 lbs. | 71.0" | Orthodox | 11 | 2 | 0 | ||
| Pete | Rodriguez | Dead Game | 5' 9" | 170 lbs. | 71.0" | Switch | 5 | 2 | 0 | |
| Nick | Roehrick | 6' 2" | 205 lbs. | -- | Orthodox | 7 | 1 | 0 | ||
| Marcos | Rogerio de Lima | Pezao | 6' 1" | 253 lbs. | 75.0" | Orthodox | 22 | 10 | 1 | |
| Brett | Rogers | The Grim | 6' 5" | 265 lbs. | 81.0" | Orthodox | 17 | 10 | 0 | |
| Brian | Rogers | The Professional Predator | 5' 11" | 185 lbs. | -- | 14 | 9 | 0 | ||
| Pete | Rogers Jr. | The Heat | 6' 0" | 145 lbs. | -- | 2 | 4 | 0 | ||
| Max | Rohskopf | Rated R | 6' 1" | 155 lbs. | 71.0" | Orthodox | 5 | 1 | 0 | |
| Marcelo | Rojo | Pitbull | 5' 8" | 145 lbs. | 71.0" | Orthodox | 16 | 10 | 0 | |
| Shane | Roller | 5' 10" | 155 lbs. | 72.0" | Orthodox | 11 | 7 | 0 | ||
| Jared | Rollins | J-Roc | 5' 9" | 170 lbs. | -- | Orthodox | 8 | 4 | 0 | |
| Tim | Roman | 6' 1" | 170 lbs. | -- | 3 | 4 | 0 | |||
| Alexandr | Romanov | King Kong | 6' 2" | 262 lbs. | 75.0" | Southpaw | 18 | 3 | 0 | |
| Ricardo | Romero | 6' 0" | 205 lbs. | 76.0" | Orthodox | 11 | 3 | 0 | ||
| Yoel | Romero | Soldier of God | 6' 0" | 185 lbs. | 73.0" | Southpaw | 13 | 5 | 0 | |
| Anthony | Romero | The Genius | 5' 11" | 155 lbs. | 70.0" | Orthodox | 8 | 0 | 0 | |
| Kaleio | Romero | KO | 5' 10" | 145 lbs. | 69.0" | Switch | 6 | 2 | 0 | |
| Roberto | Romero | El Charro Negro | 5' 8" | 155 lbs. | 70.0" | Orthodox | 8 | 4 | 1 | |
| Mara | Romero Borella | 5' 6" | 125 lbs. | 69.0" | Orthodox | 12 | 9 | 0 | ||
| Cortavious | Romious | 5' 4" | 135 lbs. | 68.0" | Southpaw | 9 | 3 | 0 | ||
| Juancamilo | Ronderos | 100 | 5' 3" | 125 lbs. | 64.0" | Southpaw | 4 | 2 | 0 | |
| Rongzhu | 5' 9" | 155 lbs. | 72.0" | Orthodox | 25 | 6 | 0 | |||
| Jesse | Ronson | The Body Snatcher | 5' 10" | 155 lbs. | 70.0" | Southpaw | 21 | 12 | 0 | |
| George | Roop | 6' 1" | 135 lbs. | 72.0" | Orthodox | 15 | 13 | 1 | ||
| Joao | Roque | 5' 6" | 155 lbs. | -- | Orthodox | 7 | 2 | 4 | ||
| Aaron | Rosa | 6' 4" | 205 lbs. | 77.0" | Orthodox | 18 | 6 | 0 | ||
| Charles | Rosa | Boston Strong | 5' 9" | 145 lbs. | 69.0" | Switch | 14 | 8 | 0 | |
| Karol | Rosa | 5' 5" | 135 lbs. | 67.0" | Orthodox | 18 | 6 | 0 | ||
| Jacob | Rosales | The Lil Badger | 5' 11" | 155 lbs. | 74.0" | Orthodox | 13 | 7 | 0 | |
| Raul | Rosas Jr. | El Nino Problema | 5' 9" | 135 lbs. | 67.0" | Switch | 10 | 1 | 0 | |
| Hilarie | Rose | 5' 3" | 115 lbs. | 63.0" | Orthodox | 4 | 2 | 0 | ||
| Jake | Rosholt | 6' 1" | 185 lbs. | -- | Orthodox | 12 | 5 | 0 | ||
| Jared | Rosholt | 6' 2" | 265 lbs. | 75.0" | Orthodox | 14 | 4 | 0 | ||
| Kevin | Rosier | 6' 4" | 275 lbs. | -- | Orthodox | 2 | 6 | 0 | ||
| Zach | Rosol | -- | 243 lbs. | -- | 3 | 2 | 0 | |||
| Shannon | Ross | The Turkish Delight | 5' 6" | 125 lbs. | 66.0" | Switch | 13 | 9 | 0 | |
| Nick | Rossborough | Leatherface | 6' 5" | 205 lbs. | -- | 26 | 19 | 1 | ||
| Kristian | Rothaermel | 6' 0" | 205 lbs. | -- | Open Stance | 4 | 3 | 0 | ||
| Ben | Rothwell | 6' 4" | 265 lbs. | 78.0" | Orthodox | 39 | 14 | 0 | ||
| Rick | Roufus | 6' 0" | 207 lbs. | -- | Southpaw | 4 | 6 | 0 | ||
| Khalil | Rountree Jr. | 6' 1" | 205 lbs. | 76.0" | Southpaw | 14 | 6 | 0 | ||
| Ronda | Rousey | Rowdy | 5' 7" | 135 lbs. | 66.0" | Orthodox | 12 | 2 | 0 | |
| Ray | Routh | 5' 8" | 185 lbs. | -- | Orthodox | 2 | 1 | 0 | ||
| Roberta | Rovel | Crusher | 5' 8" | 145 lbs. | -- | 4 | 1 | 0 | ||
| Phil | Rowe | The Fresh Prince | 6' 3" | 170 lbs. | 80.0" | Orthodox | 10 | 5 | 0 | |
| Cam | Rowston | Battle Giraffe | 6' 2" | 185 lbs. | 78.0" | Orthodox | 8 | 3 | 0 | |
| Kain | Royer | -- | 185 lbs. | -- | 2 | 2 | 0 | |||
| Brad | Royster | -- | 135 lbs. | -- | 1 | 2 | 0 | |||
| Brandon | Royval | Raw Dawg | 5' 9" | 125 lbs. | 68.0" | Southpaw | 17 | 7 | 0 | |
| Jairzinho | Rozenstruik | Bigi Boy | 6' 2" | 242 lbs. | 78.0" | Orthodox | 15 | 5 | 0 | |
| Mauricio | Rua | Shogun | 6' 1" | 205 lbs. | 76.0" | Orthodox | 27 | 14 | 1 | |
| Murilo | Rua | Ninja | 5' 11" | 185 lbs. | -- | Orthodox | 20 | 13 | 1 | |
| Marco | Ruas | King of the Streets | 6' 1" | 210 lbs. | -- | Orthodox | 9 | 4 | 2 | |
| Rodrigo | Ruas | 5' 10" | 185 lbs. | -- | Orthodox | 4 | 5 | 1 | ||
| Rodolfo | Rubio Perez | Fito | 5' 5" | 145 lbs. | -- | Orthodox | 10 | 16 | 1 | |
| Gabe | Ruediger | Godzilla | 5' 10" | 155 lbs. | -- | Orthodox | 18 | 8 | 0 | |
| Mauricio | Ruffy | 5' 11" | 155 lbs. | 75.0" | Orthodox | 11 | 1 | 0 | ||
| Eddie | Ruiz | 5' 7" | 155 lbs. | -- | Orthodox | 1 | 1 | 0 | ||
| Anthony | Ruiz | El Toro | 6' 2" | 205 lbs. | -- | Orthodox | 33 | 22 | 0 | |
| Paul | Ruiz | 5' 6" | 135 lbs. | -- | 7 | 4 | 0 | |||
| Montserrat Conejo | Ruiz | 5' 0" | 115 lbs. | 61.0" | Southpaw | 10 | 4 | 0 | ||
| Mike | Russow | 6' 1" | 255 lbs. | 73.0" | Orthodox | 15 | 3 | 0 | ||
| Bas | Rutten | El Guapo | 6' 1" | 205 lbs. | -- | Orthodox | 28 | 4 | 1 | |
| Nursulton | Ruziboev | Black | 6' 5" | 170 lbs. | 76.0" | Orthodox | 34 | 9 | 2 | |
| Casey | Ryan | -- | 185 lbs. | -- | 7 | 3 | 0 |