Poids Mi-Moyens Hommes
 | Igor Sabanov | 2-0-0 REC | #985 |  |
 | Igor Tanabe | #7729 |  | |
 | Ilya Kovalev | 1-1-0 REC | #5860 | |
 | Ilyasse Drabo | #7687 |  | |
 | Imran Daurbekov | 0-1-0 REC | #6443 |  |
 | Ion Surdu | 6-4-0 REC | #872 |  |
 | Isaac Moreno | 1-0-0 REC | #1328 |  |
 | Isaac Vallie-Flagg | 1-3-0 UFC | #4463 | |
 | Isaiah Skidmore | 0-1-0 REC | #6399 | |
 | Isaiah Watkins | 1-0-0 REC | #1289 | |
 | Iskandar Mamadaliev | 2-1-0 REC | #2104 |  |
 | Islam Dulatov | 1-0-0 UFC | #956 |  |
 | Islam Khapilaev | 0-1-0 REC | #6998 | |
 | Islam Makhachev | 18-1-0 UFC | #1 | |
 | Ismail Ismailov | 0-1-0 REC | #6653 | |
 | Italo Gomes | 0-2-0 REC | #4554 | |
 | Itso Babulaidze | 2-0-0 REC | #4656 |  |
 | Ivan Jorge | 2-2-0 UFC | #3567 | |
 | Ivan Soloviev | 1-2-0 REC | #2714 | |
 | Ivica Truscek | 2-1-0 REC | #2371 |  |