| Fighter | Nickname | Height | Weight | Association | |
 |
Isaac Butler | 0'0" (0 m) |
170 lbs (77.11 kg) |
American Top Team Portland | |
|
Isaiah Watkins | "The Fresh Prince" | 5'8" (1.73 m) |
170 lbs (77.11 kg) |
American Top Team Indianapolis |
|
Isidro Gonzalez | "Chilo" | 5'10" (1.78 m) |
185 lbs (83.91 kg) |
American Top Team Altitude |
|
Istela Nunes | 5'4" (1.63 m) |
115 lbs (52.16 kg) |
Team Nunes / American Top Team | |
|
Ivan Erslan | 6'2" (1.88 m) |
206 lbs (93.44 kg) |
American Top Team Zagreb | |
|
Ivan Sicaja | "Tirke" | 5'9" (1.75 m) |
146 lbs (66.22 kg) |
American Top Team Zagreb |
|
J.D. Domengeaux | "Swamp Thing" | 6'0" (1.83 m) |
170 lbs (77.11 kg) |
American Top Team |
|
J.P. Reese | 5'9" (1.75 m) |
147 lbs (66.68 kg) |
American Top Team | |
|
Ja Lowery | 0'0" (0 m) |
175 lbs (79.38 kg) |
American Top Team | |
|
Jack McAvoy | 5'7" (1.7 m) |
145 lbs (65.77 kg) |
American Top Team | |
|
Jaime Alvarez | 5'8" (1.73 m) |
125 lbs (56.7 kg) |
American Top Team | |
|
Jairzinho Rozenstruik | "Bigi Boy" | 6'2" (1.88 m) |
259 lbs (117.48 kg) |
American Top Team |
|
Jake Smith | "The Half-Black Attack" | 5'9" (1.75 m) |
170 lbs (77.11 kg) |
American Top Team Portland |
|
Jake Gombocz | 6'3" (1.91 m) |
169 lbs (76.66 kg) |
American Top Team | |
|
Jakub Wiklacz | "Masa" | 5'8" (1.73 m) |
135 lbs (61.23 kg) |
Arrachion Olsztyn / American Top Team |
|
James Blair | 5'6" (1.68 m) |
125 lbs (56.7 kg) |
American Top Team | |
|
James Hay | 5'11" (1.8 m) |
155 lbs (70.31 kg) |
American Top Team Palm Beach Gardens | |
|
James Williams | 0'0" (0 m) |
170 lbs (77.11 kg) |
American Top Team Tuscaloosa | |
|
Jan Todorovski | 0'0" (0 m) |
145 lbs (65.77 kg) |
American Top Team Zagreb | |
|
Janaisa Morandin | "Evil Princess" | 5'0" (1.52 m) |
126 lbs (57.15 kg) |
American Top Team |
