Tous les combattants
 | Issei Tamura | 1-2-0 UFC | #4282 |  |
 | Issouf Doumbia | 0-1-0 REC | #5906 |  |
 | Istela Nunes | 0-5-0 UFC | #2733 |  |
| Istvan Schulcz | 1-0-0 REC | #7789 |  |
 | Italo Cruz | 2-1-0 REC | #1336 | |
 | Italo Gomes | 0-2-0 REC | #4266 | |
 | Italo Julio | 0-1-0 REC | #7531 | |
 | Italo Ribeiro | 0-2-0 REC | #5767 | |
 | Itay Tratner | 0-1-0 REC | #7286 |  |
 | Itso Babulaidze | 2-0-0 REC | #4503 |  |
 | Itsuki Hirata | #5942 | | |
 | Iuri Alcantara | 10-7-0, 1NC UFC | #1014 | |
| Ivan Alves | 0-1-0 REC | #6825 | |
 | Ivan Bogdanov | 2-2-0 REC | #1979 |  |
 | Ivan Buchinger | 8-3-0 REC | #898 |  |
 | Ivan Erslan | 1-3-0 UFC | #967 |  |
 | Ivan Gnizditskiy | #7731 | | |
 | Ivan Jorge | 2-2-0 UFC | #3465 | |
 | Ivan Klevets | 1-2-0 REC | #2373 |  |
 | Ivan Menjivar | 4-5-0 UFC | #2843 |  |
 | Ivan Romanov | 0-1-0 REC | #6008 | |
 | Ivan Salaverry | 3-4-0 UFC | #3002 | |
 | Ivan Santana | 0-1-0 REC | #5352 |  |
 | Ivan Serati | 0-1-0 UFC | #5896 |  |
 | Ivan Soloviev | 1-2-0 REC | #2415 | |