Sorted alphabetically by last name · 2711 fighters
| Name | Nickname | |
|---|---|---|
| RK | Rob Kimmons | "The Rosedale Reaper" |
| RM | Rob MacDonald | "Maximus" |
| RW | Rob Wilkinson | "Razor" |
| RY | Rob Yundt | "Monster" |
| RL | Robbie Lawler | "Ruthless" |
| RD | Robelis Despaigne | "The Big Boy" |
| RB | Robert Bryczek | |
| RD | Robert Drysdale | |
| RL | Robert Lucarelli | |
| RM | Robert McDaniel | "Bubba" |