Tous les combattants
 | Islam Youssef | 2-1-0 REC | #2306 |  |
 | Islam Yunusov | #7824 |  | |
 | Islambek Baktybek Uulu | #7807 |  | |
 | Islem Masraf | 2-2-0 REC | #2722 |  |
 | Ismael Bonfim | 2-4-0 UFC | #415 |  |
 | Ismail Ismailov | 0-1-0 REC | #6653 | |
 | Ismail Israilov | 1-0-0 REC | #7425 | |
 | Ismail Kelemetov | 1-0-0 REC | #6270 | |
 | Ismail Naurdiev | 4-3-0 UFC | #1179 |  |
 | Israel Adesanya | 13-6-0 UFC | #35 |  |
 | Israel Aquino | 0-1-0 REC | #6691 |  |
 | Israel Delgado | 1-1-0 REC | #6114 | |
 | Issa Hosokawa | 0-1-0 REC | #6939 |  |
 | Issa Isakov | 0-1-0 REC | #4378 |  |
 | Issei Tamura | 1-2-0 UFC | #4373 | |
| Issouf Doumbia | 0-1-0 REC | #6177 | |
 | Istela Nunes | 0-5-0 UFC | #2792 | |
| Istvan Schulcz | 1-0-0 REC | #7876 |  |
 | Italo Cruz | 2-1-0 REC | #1628 | |
 | Italo Gomes | 0-2-0 REC | #4434 | |
 | Italo Julio | 0-1-0 REC | #7526 | |
 | Italo Ribeiro | 0-2-0 REC | #5768 | |
 | Itay Tratner | 0-1-0 REC | #7504 |  |
 | Itso Babulaidze | 2-0-0 REC | #4567 |  |
 | Itsuki Hirata | #5742 | |