Poids Légers Hommes
 | Noah Gugnon | 2-1-0 REC | #1088 |  |
 | Nobumitsu Osawa | 0-1-0 REC | #6606 |  |
 | Noe Dellachi | 1-0-0 REC | #1615 | |
 | Nonato Junior | 0-2-0 REC | #3964 |  |
 | Nurkhan Zhumagazy | 1-0-0 REC | #1445 |  |
 | Nursultan Jumadilde | 0-1-0 REC | #6882 |  |
 | Nurullo Aliev | 3-0-0 UFC | #950 |  |
 | Ognjen Dimic | 0-3-0 REC | #3046 |  |
 | Oleksandr Moisa | 2-1-0 REC | #301 |  |
 | Olivier Aubin-Mercier | 7-5-0 UFC | #171 |  |
 | Omar Morales | 3-4-0 UFC | #2339 |  |
 | Omar Reguigui | 0-1-0, 1NC REC | #4488 |  |
 | Omar Tugarev | 0-2-0 REC | #3837 |  |
 | Omiel Brown | 9-2-0 REC | #168 |  |
 | Ondrej Petrasek | 1-1-0 REC | #6124 |  |
 | Orlando Wilson Prins | 2-4-0 REC | #2839 |  |
 | Oron Kahlon | 0-1-0 REC | #5251 |  |
 | Oscar Mendez | 0-1-0 REC | #5203 |  |
 | Oscar Ownsworth | 1-3-0 REC | #3216 | |
 | Osman Minbatirov | 1-1-0 REC | #5545 |  |