Poids Lourds Hommes
 | Ilir Latifi | 9-7-0 UFC | #970 |  |
 | Islambek Baktybek Uulu | #7854 |  | |
 | Istvan Schulcz | 1-0-0 REC | #7937 |  |
 | Ivan Romanov | 0-1-0 REC | #5865 |  |
 | Ivan Santana | 0-1-0 REC | #5172 |  |
 | Ivan Vitasovic | 1-1-0 REC | #5568 |  |
 | Jack May | 0-2-0 UFC | #4033 |  |
| Jack McLaughlin | 0-1-0 UFC | #6584 | |
 | Jackson Ross | 0-1-0 REC | #5287 | |
 | Jailton Almeida | 8-3-0 UFC | #437 |  |
 | Jairzinho Rozenstruik | 9-6-0 UFC | #669 |  |
 | Jake Collier | 5-9-0 UFC | #1755 | |
 | Jake Heun | 0-1-0 REC | #7792 | |
 | Jamal Pogues | 2-2-0 UFC | #2388 | |
 | James Mulheron | 0-1-0 UFC | #7547 |  |
 | James Toney | 0-1-0 UFC | #4975 | |
 | Jared Rosholt | 6-2-0 UFC | #721 | |
 | Jared Torgeson | 1-0-0 REC | #7663 | |
 | Jared Vanderaa | 1-6-0 UFC | #2805 | |
 | Jarjis Danho | 1-1-1 UFC | #4629 |  |