';
| Fighter | Nickname | Height | Weight | Association | |
| Alexandre Pereira | "Firmeza" | 5'8" (1.73 m) |
170 lbs (77.11 kg) |
Pinheiros Fight Team / Six One | |
| Alexis Chapa | 5'2" (1.57 m) |
125 lbs (56.7 kg) |
One Nation Fight Team | ||
| Andrew Borcher | 5'11" (1.8 m) |
155 lbs (70.31 kg) |
One on One Fight Team | ||
| Bill Peck | 0'0" (0 m) |
170 lbs (77.11 kg) |
One Nation Fight Team | ||
| Bruno Robert | "The Chaos" | 5'10" (1.78 m) |
170 lbs (77.11 kg) |
Number One Fight & Fitness | |
| Charles Ashby | 5'10" (1.78 m) |
205 lbs (92.99 kg) |
One on One Fight Team | ||
| Dyogo de Barros Lima Duarte | "Mumia" | 5'11" (1.8 m) |
155 lbs (70.31 kg) |
One Fight Team | |
| Eli Pokorney | 6'6" (1.98 m) |
205 lbs (92.99 kg) |
One Touch Fight Team & Academy | ||
| Ernesto Lopez | 5'11" (1.8 m) |
170 lbs (77.11 kg) |
One Nation Fight Team | ||
| Gabriel Prieto | 5'8" (1.73 m) |
155 lbs (70.31 kg) |
Vitruvian Fight & Fitness / One Kick's Gym | ||
| Han Yuan | 0'0" (0 m) |
145 lbs (65.77 kg) |
One Fight Camp | ||
| Joao Dantas | 6'2" (1.88 m) |
185 lbs (83.91 kg) |
Number One Fight Center | ||
| Joe Wong | 5'10" (1.78 m) |
186 lbs (84.37 kg) |
One Fight Camp | ||
| Jose Augusto Luque | "Guto" | 0'0" (0 m) |
145 lbs (65.77 kg) |
Animal Team / One Fight | |
| Josh Powell | "JP" | 6'3" (1.91 m) |
244 lbs (110.68 kg) |
One Nation Fight Team | |
| Julian Torres | 0'0" (0 m) |
145 lbs (65.77 kg) |
One Touch Fight Team & Academy | ||
| Kathy Solorzano | 5'3" (1.6 m) |
115 lbs (52.16 kg) |
One Nation Fight Team | ||
| Ken Sells | 6'0" (1.83 m) |
155 lbs (70.31 kg) |
One on One Fight Company | ||
| Mackenzie Stiller | "Mack Judo" | 5'2" (1.57 m) |
114 lbs (51.71 kg) |
One Touch Fight Team | |
| Marco Delgadillo | 5'11" (1.8 m) |
170 lbs (77.11 kg) |
One Touch Fight Team & Academy | ||