';
| Fighter | Nickname | Height | Weight | Association | |
| Rachid Victoria | 0'0" (0 m) |
145 lbs (65.77 kg) |
Ruthless Fight Company | ||
| Remco van den Brink | 0'0" (0 m) |
205 lbs (92.99 kg) |
Ruthless Fight Company | ||
| Ricardo Thompson | "Iron Bull" | 0'0" (0 m) |
170 lbs (77.11 kg) |
Ruthless Sports Academy | |
| Roland Bienga | "Rollan" | 0'0" (0 m) |
170 lbs (77.11 kg) |
Ruthless Fighting Company | |
| Romario Martin | 0'0" (0 m) |
170 lbs (77.11 kg) |
Ruthless Sports Academy | ||
| Roxy Reid | "ROX" | 6'3" (1.91 m) |
195 lbs (88.45 kg) |
Ruthless Sports Academy | |
| Rudy Morales | "Ruthless" | 5'8" (1.73 m) |
145 lbs (65.77 kg) |
Wand Fight Team / Ruthless Fight Team | |
| Salvador Sanchez | "Kalaka" | 5'7" (1.7 m) |
135 lbs (61.23 kg) |
Ruthless Fight Team | |
| Sami Antar | 6'6" (1.98 m) |
205 lbs (92.99 kg) |
Ruthless Fight Company / Oosterbaan MMA | ||
| Scott Kelsey | 5'8" (1.73 m) |
145 lbs (65.77 kg) |
Ruthless Fighting Team | ||
| Scott Kelsey Phillips | "King" | 5'6" (1.68 m) |
145 lbs (65.77 kg) |
Ruthless Fighting Team | |
| Seyed Reza Shirzadeh Iniolia | "Borz" | 5'5" (1.65 m) |
135 lbs (61.23 kg) |
Ruthless | |
| Shanice Blake | 5'5" (1.65 m) |
125 lbs (56.7 kg) |
Ruthless Sports Academy | ||
| Shiaeine Blake | "De Great" | 5'10" (1.78 m) |
155 lbs (70.31 kg) |
Ruthless Sports Academy | |
| Suleyman Nacar | 0'0" (0 m) |
145 lbs (65.77 kg) |
Ruthless Fighting Company | ||
| Tifanie Gordon | 0'0" (0 m) |
145 lbs (65.77 kg) |
Ruthless Sports Academy | ||
| Todd Young | 0'0" (0 m) |
170 lbs (77.11 kg) |
Ruthless | ||
| Tommy Morales | "Topp Gunn" | 5'7" (1.7 m) |
155 lbs (70.31 kg) |
Ruthless Fight Team | |
| Tycho Brakel | 6'3" (1.91 m) |
155 lbs (70.31 kg) |
Ruthless Fight Company | ||
| Walter Garzon | "The Chosen One" | 5'8" (1.73 m) |
155 lbs (70.31 kg) |
Ruthless Fight Team | |