Tous les combattants
 | Isaac Dulgarian | 2-2-0 UFC | #2072 |  |
 | Isaac Muluh | 0-1-0 REC | #3704 |  |
 | Isaac Omeda | 0-0-1 REC | #5731 |  |
 | Isaac Thomson | 0-1-0 UFC | #907 |  |
 | Isaac Vallie-Flagg | 1-3-0 UFC | #3973 | |
 | Isabela de Padua | 0-1-0 REC | #6520 |  |
 | Isabella de Padua | 0-1-0 UFC | #6138 | |
 | Isai Ramos | 1-1-0 REC | #4386 |  |
 | Isaiah Arechiga | 0-1-0 REC | #6434 | |
 | Isaiah Diggs | 0-1-0 REC | #5399 | |
 | Isaiah Figueroa | 0-1-0 REC | #6876 | |
 | Isaiah Flores | 0-1-0 REC | #6910 | |
 | Isaiah Hokit | 2-0-0 REC | #4137 | |
 | Isaiah Joans | 0-1-0 REC | #6588 | |
 | Isaiah Mahto | #7340 | | |
 | Isaiah Pinson | 3-3-0 REC | #1643 | |
 | Isaiah Skidmore | 0-1-0 REC | #5536 | |
 | Isaias Simoes | 0-1-0 REC | #6890 | |
 | Isame Ennani | 1-0-0 REC | #7364 |  |
 | Isao Kobayashi | 0-1-0 REC | #6196 |  |
 | Isi Fitikefu | #7121 | | |
 | Isiah Torres | 1-0-0 REC | #6135 | |
 | Isis Verbeek | 1-1-0 REC | #5313 |  |
 | Iskandar Mamadaliev | 2-1-0 REC | #1094 |  |
 | Islam Aguev | 1-1-0 REC | #755 |  |