Tous les combattants
 | Isaac Vallie-Flagg | 1-3-0 UFC | #4415 |  |
 | Isabela de Padua | 0-1-0 REC | #7176 |  |
 | Isabella de Padua | 0-1-0 UFC | #6580 | |
 | Isai Ramos | 1-1-0 REC | #4635 |  |
 | Isaiah Arechiga | 0-1-0 REC | #7154 | |
 | Isaiah Diggs | 0-1-0 REC | #6354 | |
 | Isaiah Figueroa | 0-1-0 REC | #7617 | |
 | Isaiah Flores | 0-1-0 REC | #7481 | |
 | Isaiah Hokit | 2-0-0 REC | #4395 | |
 | Isaiah Joans | 0-1-0 REC | #7357 | |
 | Isaiah Mahto | #8022 | | |
 | Isaiah Pinson | 3-3-0 REC | #2304 | |
 | Isaiah Skidmore | 0-1-0 REC | #6285 | |
 | Isaiah Watkins | 1-0-0 REC | #1061 | |
 | Isaias Simoes | 0-1-0 REC | #7501 | |
 | Isame Ennani | 1-0-0 REC | #7891 |  |
 | Isao Kobayashi | 0-2-0 REC | #4394 |  |
 | Isi Fitikefu | #7730 |  | |
 | Isiah Torres | 1-0-0 REC | #7089 | |
 | Isis Verbeek | 1-1-0 REC | #5584 |  |
 | Iskandar Mamadaliev | 2-1-0 REC | #1962 |  |
 | Islam Aguev | 1-1-0 REC | #1868 |  |
 | Islam Albekov | 1-1-0 REC | #1851 | |
 | Islam Babatov | 0-1-0 REC | #6064 | |
 | Islam Bakharchiev | 1-0-0 REC | #3212 | |