Poids Légers Hommes
 | Ioan Harris | 1-3-0 REC | #2826 |  |
 | Iras Khizriev | 1-0-0 REC | #1723 |  |
 | Iraskha Khizriev | #7239 | | |
 | Isaiah Figueroa | 0-1-0 REC | #6839 |  |
 | Isaiah Flores | 0-1-0 REC | #6903 | |
 | Isaiah Joans | 0-1-0 REC | #6618 | |
 | Isaiah Mahto | #7314 | | |
 | Islam Aguev | 1-1-0 REC | #715 |  |
 | Islam Isaev | 0-2-0 REC | #3691 | |
 | Islam Mamedov | 6-1-1 REC | #1939 | |
 | Ismael Bonfim | 2-3-0 UFC | #774 |  |
 | Israel Delgado | 1-1-0 REC | #5402 | |
 | Issa Isakov | 0-1-0 REC | #4599 |  |
 | Italo Cruz | 2-0-0 REC | #533 | |
 | Italo Julio | 0-1-0 REC | #6800 | |
 | Ivan Buchinger | 8-3-0 REC | #584 |  |
 | Ivan Klevets | 1-2-0 REC | #1703 |  |
 | J.C. Cottrell | 0-2-0 UFC | #4933 | |
 | Jack Becker | 0-1-0 REC | #4534 |  |
 | Jacob Bohn | 0-1-0 REC | #6594 | |