| cast |
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| Series Regulars | |||
| |||
| Mark Burnett | Mark Burnett Executive Producer | Andrei Arlovski | Andrei Arlovski Fighter |
| Ben Lagman | Ben Lagman Fighter | Conor Heun | Conor Heun Fighter |
| Eddie Alvarez | Eddie Alvarez Fighter | Jake Shields | Jake Shields Fighter |
| Jon Murphy | Jon Murphy Fighter | Michael Westbrook | Michael Westbrook Fighter |
| Thomas "Wildman" Denny | Thomas "Wildman" Denny Fighter | Tony Bonello | Tony Bonello Fighter |
| Tony Lopez | Tony Lopez Fighter | Jason "Mayhem" Miller | Jason "Mayhem" Miller Host |
| "Big" John McCarthy | "Big" John McCarthy Referee | Carlos "Cutman" Vargas | Carlos "Cutman" Vargas Self |
| Jeremy Horn | Jeremy Horn Self | Jeremy Williams | Jeremy Williams Self |