Tous les combattants
 | Israel Delgado | 1-1-0 REC | #5812 |  |
 | Issa Hosokawa | #8071 |  | |
 | Issa Isakov | 0-1-0 REC | #4545 |  |
 | Issei Tamura | 1-2-0 UFC | #4270 | |
 | Issouf Doumbia | 0-1-0 REC | #5908 | |
 | Istela Nunes | 0-5-0 UFC | #2731 |  |
| Istvan Schulcz | 1-0-0 REC | #7746 |  |
 | Italo Cruz | 2-1-0 REC | #1255 | |
 | Italo Gomes | 0-2-0 REC | #4225 | |
 | Italo Julio | 0-1-0 REC | #7448 | |
 | Italo Ribeiro | 0-2-0 REC | #5670 | |
 | Itay Tratner | 0-1-0 REC | #7219 |  |
 | Itso Babulaidze | 2-0-0 REC | #4483 |  |
 | Itsuki Hirata | #5807 | | |
 | Iuri Alcantara | 10-7-0, 1NC UFC | #1018 | |
| Ivan Alves | 0-1-0 REC | #6801 | |
 | Ivan Bogdanov | 2-2-0 REC | #1923 |  |
 | Ivan Buchinger | 8-3-0 REC | #887 |  |
 | Ivan Erslan | 1-3-0 UFC | #911 |  |
 | Ivan Gnizditskiy | #7686 | | |
 | Ivan Jorge | 2-2-0 UFC | #3444 | |
 | Ivan Klevets | 1-2-0 REC | #2311 |  |
 | Ivan Menjivar | 4-5-0 UFC | #2852 |  |
 | Ivan Romanov | 0-1-0 REC | #6023 | |
 | Ivan Salaverry | 3-4-0 UFC | #2977 | |