Poids Mi-Moyens Hommes
 | Isaac Vallie-Flagg | 1-3-0 UFC | #3960 |  |
 | Isaiah Skidmore | 0-1-0 REC | #5493 | |
 | Iskandar Mamadaliev | 2-1-0 REC | #1058 |  |
 | Islam Dulatov | 1-0-0 UFC | #1073 |  |
 | Islam Khapilaev | 0-1-0 REC | #6236 | |
 | Islam Makhachev | 17-1-0 UFC | #2 |  |
 | Italo Gomes | 0-2-0 REC | #5799 |  |
 | Itso Babulaidze | 2-0-0 REC | #4258 |  |
 | Ivan Jorge | 2-2-0 UFC | #3211 | |
 | Ivan Soloviev | 1-2-0 REC | #1746 | |
 | Ivica Truscek | 2-1-0 REC | #1339 |  |
 | J.P. Saint Louis | 1-0-0 REC | #2199 | |
 | Jacek Gac | 1-1-0 REC | #2626 |  |
 | Jack Congdon | 0-1-0 REC | #4935 | |
 | Jack Dedames | #7262 |  | |
 | Jack Della Maddalena | 8-1-0 UFC | #44 |  |
 | Jack Grant | 1-2-0 REC | #3794 | |
 | Jack Shields | 4-3-0, 1NC UFC | #1502 | |
 | Jack Tucker | 0-1-0 REC | #6610 |  |
 | Jack Woodard | #7433 | |