Tous les combattants
 | Irene Aldana | 8-6-0 UFC | #931 |  |
 | Irgit Oveenchi | 0-1-0 REC | #6431 |  |
 | Irina Alekseeva | 1-3-0 UFC | #2744 | |
 | Iris Marmouset | 0-1-0 REC | #6169 |  |
 | Irlaine Gasai | 0-1-0 REC | #7750 |  |
 | Irwin Rivera | 1-2-0 UFC | #4046 | |
 | Isa Magomedov | #8009 | | |
 | Isaac Dulgarian | 2-2-0 UFC | #2607 |  |
 | Isaac Muluh | 0-1-0 REC | #4262 |  |
 | Isaac Omeda | 0-0-1 REC | #6462 |  |
 | Isaac Thomson | 0-1-0 UFC | #1429 |  |
 | Isaac Vallie-Flagg | 1-3-0 UFC | #4367 | |
 | Isabela de Padua | 0-1-0 REC | #7199 | |
 | Isabella de Padua | 0-1-0 UFC | #6618 | |
 | Isai Ramos | 1-1-0 REC | #4657 |  |
 | Isaiah Arechiga | 0-1-0 REC | #7166 | |
 | Isaiah Diggs | 0-1-0 REC | #6414 | |
 | Isaiah Figueroa | 0-1-0 REC | #7644 | |
 | Isaiah Flores | 0-1-0 REC | #7527 | |
 | Isaiah Hokit | 2-0-0 REC | #4409 | |
 | Isaiah Joans | 0-1-0 REC | #7384 | |
 | Isaiah Mahto | #8052 | | |
 | Isaiah Pinson | 3-3-0 REC | #2331 | |
 | Isaiah Skidmore | 0-1-0 REC | #6331 | |
 | Isaiah Watkins | 1-0-0 REC | #1132 | |