Tous les combattants
 | Issei Tamura | 1-2-0 UFC | #4544 |  |
 | Issouf Doumbia | 0-1-0 REC | #6465 |  |
 | Istela Nunes | 0-5-0 UFC | #2885 |  |
| Istvan Schulcz | 1-0-0 REC | #8025 |  |
 | Italo Cruz | 2-1-0 REC | #1901 | |
 | Italo Gomes | 0-2-0 REC | #4679 | |
 | Italo Julio | 0-1-0 REC | #7576 | |
 | Italo Ribeiro | 0-2-0 REC | #5944 | |
 | Itay Tratner | 0-1-0 REC | #7748 |  |
 | Itso Babulaidze | 2-0-0 REC | #4785 |  |
 | Itsuki Hirata | #5463 | | |
 | Iuri Alcantara | 10-7-0, 1NC UFC | #1047 | |
| Ivan Alves | 0-1-0 REC | #7191 | |
 | Ivan Bogdanov | 2-2-0 REC | #2349 |  |
 | Ivan Buchinger | 8-3-0 REC | #1048 |  |
 | Ivan Erslan | 1-3-0 UFC | #1389 |  |
 | Ivan Gnizditskiy | #6272 | | |
 | Ivan Jorge | 2-2-0 UFC | #3633 | |
 | Ivan Klevets | 2-2-0 REC | #840 |  |
 | Ivan Menjivar | 4-5-0 UFC | #2912 |  |
 | Ivan Romanov | 0-1-0 REC | #5635 | |
 | Ivan Salaverry | 3-4-0 UFC | #3144 | |
 | Ivan Santana | 0-1-0 REC | #5238 |  |
 | Ivan Serati | 0-1-0 UFC | #6131 |  |
 | Ivan Soloviev | 1-2-0 REC | #2828 | |