Tous les combattants
 | Ioan Harris | 1-3-0 REC | #3262 |  |
 | Ion Cutelaba | 9-11-1 UFC | #327 |  |
 | Ion Surdu | 6-4-0 REC | #700 | |
 | Ion Taburceanu | 0-2-0, 1NC REC | #4578 | |
 | Iony Razafiarison | 1-2-0 REC | #4567 |  |
 | Irakli Kuchukhidze | #8119 |  | |
 | Iras Khizriev | 1-0-0 REC | #2552 |  |
 | Iraskha Khizriev | #7750 | | |
 | Irene Aldana | 8-6-0 UFC | #910 |  |
 | Irgit Oveenchi | 0-1-0 REC | #6393 | |
 | Irina Alekseeva | 1-3-0 UFC | #2711 | |
 | Iris Marmouset | 0-1-0 REC | #6065 | |
 | Irlaine Gasai | 0-1-0 REC | #7679 |  |
 | Irwin Rivera | 1-2-0 UFC | #4022 | |
 | Isa Magomedov | #7980 | | |
 | Isaac Dulgarian | 2-2-0 UFC | #2574 |  |
 | Isaac Muluh | 0-1-0 REC | #4190 |  |
 | Isaac Omeda | 0-0-1 REC | #6482 |  |
 | Isaac Thomson | 0-1-0 UFC | #1393 |  |
 | Isaac Vallie-Flagg | 1-3-0 UFC | #4388 | |
 | Isabela de Padua | 0-1-0 REC | #7249 | |
 | Isabella de Padua | 0-1-0 UFC | #6452 | |
 | Isai Ramos | 1-1-0 REC | #4641 |  |
 | Isaiah Arechiga | 0-1-0 REC | #7070 | |
 | Isaiah Diggs | 0-1-0 REC | #6274 | |