Poids Légers Hommes
 | Isao Kobayashi | 0-2-0 REC | #4442 |  |
 | Islam Aguev | 1-1-0 REC | #1938 |  |
 | Islam Isaev | 0-2-0 REC | #4260 | |
 | Islam Mamedov | 6-1-1 REC | #2153 | |
 | Ismael Bonfim | 2-4-0 UFC | #436 |  |
 | Israel Delgado | 1-1-0 REC | #6160 |  |
 | Issa Isakov | 0-1-0 REC | #4398 |  |
 | Italo Cruz | 2-1-0 REC | #1677 | |
 | Italo Julio | 0-1-0 REC | #7502 | |
 | Italo Ribeiro | 0-2-0 REC | #5755 | |
 | Ivan Buchinger | 8-3-0 REC | #989 |  |
 | Ivan Klevets | 2-2-0 REC | #578 |  |
 | Ivan Yashmanov | 0-1-0 REC | #7242 | |
 | J.C. Cottrell | 0-2-0 UFC | #5615 | |
 | Jaad Sekkal | 1-0-0 REC | #2337 |  |
 | Jack Becker | 0-1-0 REC | #5334 |  |
 | Jack Sheehan | #8123 | | |
 | Jacob Bohn | 0-1-0 REC | #7013 | |
| Jacob Hill | 0-1-0 REC | #7367 | |
 | Jacob Lagoa | 1-0-0 REC | #2027 | |