';
| Fighter | Nickname | Height | Weight | Association | |
| Ibrahim Kallie | "African Warrior" | 5'8" (1.73 m) |
171 lbs (77.56 kg) |
Alliance Jiu Jitsu | |
| Ignacio di Paola | "Nacho" | 5'8" (1.73 m) |
145 lbs (65.77 kg) |
The Monkey Team / Alliance JiuJitsu Ecuador | |
| Igor Koituklu | 0'0" (0 m) |
145 lbs (65.77 kg) |
Alliance Moscow | ||
| Ikkei Nagamura | 6'0" (1.83 m) |
185 lbs (83.91 kg) |
Alliance-Square | ||
| Imran Magaramov | 0'0" (0 m) |
135 lbs (61.23 kg) |
Alliance Fighters | ||
| Isao Terada | 5'7" (1.7 m) |
145 lbs (65.77 kg) |
Alliance-Square | ||
| Isaul Magadan | "Junior" | 5'11" (1.8 m) |
185 lbs (83.91 kg) |
Alliance MMA | |
| Ismar Nugo | 0'0" (0 m) |
0 lbs (0 kg) |
Mao de Pedra / Alliance Dojo | ||
| Ivan Vulchin | 5'11" (1.8 m) |
155 lbs (70.31 kg) |
Alliance Ukraine | ||
| Jack Young | 0'0" (0 m) |
125 lbs (56.7 kg) |
Alliance BJJ Derby / Team Rough House | ||
| Jackie Cataline | "The Hybrid" | 5'6" (1.68 m) |
145 lbs (65.77 kg) |
Alliance Jiu-Jitsu | |
| Jackson Andre dos Santos | 0'0" (0 m) |
185 lbs (83.91 kg) |
Alliance Jiu-Jitsu | ||
| Jacob Hardgrove | 5'11" (1.8 m) |
155 lbs (70.31 kg) |
Nor-Cal Fighting Alliance | ||
| Jahongir Khodzhaev | 0'0" (0 m) |
125 lbs (56.7 kg) |
Alliance Fighter | ||
| Jake Kohn | 0'0" (0 m) |
185 lbs (83.91 kg) |
Cape Cod Fighting Alliance | ||
| Jamal Morgan | 5'4" (1.63 m) |
145 lbs (65.77 kg) |
Military Alliance | ||
| James Harbison | "Jimmy" | 6'0" (1.83 m) |
170 lbs (77.11 kg) |
Alliance MMA | |
| Janosch Stefan | "The Rock" | 6'3" (1.91 m) |
245 lbs (111.13 kg) |
Alliance / Mach 1 | |
| Jason Lambert | "The Punisher" | 5'10" (1.78 m) |
205 lbs (92.99 kg) |
Alliance MMA | |
| Jay Fillippini | 0'0" (0 m) |
170 lbs (77.11 kg) |
Cape Cod Fighting Alliance | ||