| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |