Poids Mi-Moyens Hommes
 | Orlando Sanders | 0-1-0 REC | #7447 |  |
 | Orlando Wiet | 1-1-0 UFC | #3098 |  |
 | Oseyiomon Oiyemhonlan | 1-2-0 REC | #4656 | |
 | Oskar Staszczak | 1-0-0 REC | #2314 |  |
 | Oskar Szczepaniak | 4-2-0 REC | #2954 | |
 | Osvaldo Benedito | 0-1-0 REC | #5256 |  |
 | Oton Jasse | 0-3-0 REC | #4229 |  |
 | Oualy Tandia | 1-0-0 REC | #614 | |
 | Ousmane Camara | 1-0-0 REC | #1205 | |
 | Ovidio Bojorquez | 0-1-0 REC | #6963 |  |
 | Paddy Wilkinson | 0-1-0 REC | #6407 |  |
 | Papy Abedi | 1-3-0 UFC | #3643 |  |
 | Pascal Krauss | 2-2-0 UFC | #3413 |  |
 | Pat Miletich | 8-2-0 UFC | #326 | |
 | Pat Pytlik | 0-1-0 REC | #6345 |  |
 | Patrice Evra | #3024 | | |
 | Patrick Cote | 10-11-0 UFC | #872 | |
 | Patrick Habirora | 6-0-0 REC | #267 |  |
 | Patrick Spirk | 0-1-0 REC | #5935 |  |
 | Patrik Celic | 0-1-0 REC | #6511 |  |