Poids Mi-Lourds Hommes
 | Norbert Pietrzak | 3-1-0 REC | #928 |  |
 | Oleg Olenichev | 0-1-0 REC | #5933 |  |
 | Oleg Sanakoev | 0-1-0 REC | #7662 | |
 | Oli Thompson | 0-2-0 UFC | #5215 | |
 | Onassis Parungao | 1-0-0 UFC | #6235 |  |
 | Osama Elsaidy | 0-1-0 REC | #7152 |  |
 | Oumar Sy | 3-2-0 UFC | #357 |  |
 | Ovince St. Preux | 15-13-0 UFC | #296 |  |
 | Panagiotis Stroumpoulis | 0-2-0 REC | #6989 |  |
 | Paolo Anastasi | 0-1-0 REC | #7626 |  |
 | Patrick Cummins | 6-7-0 UFC | #1760 | |
 | Patryk Grabowski | #7890 |  | |
 | Paul Buentello | 3-3-0 UFC | #2939 | |
 | Paul Craig | 9-10-1, 1NC UFC | #621 |  |
 | Paul Jones | 1-1-0 UFC | #5531 | |
 | Paulin Begai | 5-5-1 REC | #1067 | |
 | Paulo Costa | 8-4-0 UFC | #87 |  |
 | Paulo Renato Jr. | 0-2-0 REC | #4949 | |
 | Pavol Langer | 3-5-0 REC | #3340 |  |
 | Pawan Maan Singh | 0-1-0 REC | #6014 |  |