Poids Légers Hommes
 | Iraskha Khizriev | #7604 |  | |
 | Isaiah Figueroa | 0-1-0 REC | #7402 |  |
 | Isaiah Flores | 0-1-0 REC | #7345 | |
 | Isaiah Joans | 0-1-0 REC | #7168 | |
 | Isaiah Mahto | #7877 | | |
 | Isao Kobayashi | 0-2-0 REC | #4237 |  |
 | Islam Aguev | 1-1-0 REC | #1550 |  |
 | Islam Isaev | 0-2-0 REC | #4086 | |
 | Islam Mamedov | 6-1-1 REC | #2125 | |
 | Ismael Bonfim | 2-3-0 UFC | #721 |  |
 | Israel Delgado | 1-1-0 REC | #5812 | |
 | Issa Isakov | 0-1-0 REC | #4545 |  |
 | Italo Cruz | 2-1-0 REC | #1255 | |
 | Italo Julio | 0-1-0 REC | #7448 | |
 | Italo Ribeiro | 0-2-0 REC | #5670 | |
 | Ivan Buchinger | 8-3-0 REC | #887 |  |
 | Ivan Klevets | 1-2-0 REC | #2311 |  |
 | J.C. Cottrell | 0-2-0 UFC | #5380 | |
 | Jaad Sekkal | 1-0-0 REC | #2048 |  |
 | Jack Becker | 0-1-0 REC | #4975 |  |