| Fighter | Record | Last Bout |
|---|---|---|
| Juan Manuel Puig | 11-4-0 | 2014-11-22 |
| Julio Paulino | 23-5-0 | 2010-09-25 |
| Karo Parisyan | 24-11-0 (1 NC) | 2010-11-20 |
| Kurt Pellegrino | 16-7-0 | 2011-03-19 |
| Lara Procopio | 7-2-0 | 2021-06-19 |
| Larissa Pacheco | 10-2-0 | 2015-03-14 |
| Lucie Pudilova | 14-10-0 | 2024-07-20 |
| Luis Pajuelo | 8-2-0 | 2024-03-23 |
| Luis Pena | 9-3-0 | 2021-04-17 |
| Maki Pitolo | 13-9-0 | 2021-12-04 |
| Marco Polo Reyes | 8-7-0 | 2019-09-21 |
| Markus Perez | 12-5-0 | 2021-01-20 |
| Michael Patt | 12-4-0 | 2009-03-07 |
| Michel Prazeres | 26-4-0 | 2021-06-26 |
| Mike Perry | 14-8-0 | 2021-04-10 |
| Mike Pierce | 17-7-0 | 2015-12-11 |
| Mike Pyle | 27-14-1 | 2018-03-03 |
| Nam Phan | 21-17-0 | 2014-03-01 |
| Nick Pace | 8-3-0 | 2011-11-19 |
| Nick Penner | 11-3-0 | 2012-12-14 |
| Norman Parke | 23-6-1 | 2016-02-27 |
| Onassis Parungao | 2-1-0 | 1995-09-08 |
| Oskar Piechota | 11-3-1 (1 NC) | 2020-06-20 |
| Pablo Garza | 12-4-0 | 2013-04-06 |
| Paddy Holohan | 12-2-1 | 2015-10-24 |
| Paige VanZant | 8-5-0 | 2020-07-11 |
| Pannie Kianzad | 17-9-0 | 2024-08-10 |
| Papy Abedi | 10-4-0 | 2013-08-28 |
| Parker Porter | 14-9-0 | 2023-08-26 |
| Pascal Krauss | 11-2-0 | 2013-08-31 |
| Pat Audinwood | 11-2-1 | 2010-12-11 |
| Pat Barry | 8-7-0 | 2013-12-06 |
| Pat Healy | 34-23-0 (1 NC) | 2014-07-16 |
| Pat Miletich | 29-7-2 | 2002-03-22 |
| Pat Schilling | 5-2-0 | 2012-06-01 |
| Patrick Cote | 23-11-0 | 2017-04-08 |
| Patrick Cummins | 10-7-0 | 2019-05-18 |
| Patrick Smith | 20-17-0 | 1995-07-14 |
| Patrick Walsh | 10-3-0 | 2015-02-14 |
| Patrick Williams | 8-6-0 | 2018-04-14 |
| Paul Bradley | 23-8-0 (2 NC) | 2011-11-12 |
| Paul Buentello | 35-17-0 | 2010-03-21 |
| Paul Creighton | 3-1-0 | 2002-05-10 |
| Paul Daley | 39-15-2 | 2010-05-08 |
| Paul Felder | 17-6-0 | 2020-11-14 |
| Paul Georgieff | 6-2-0 | 2007-12-08 |
| Paul Herrera | 1-1-0 | 1996-02-16 |
| Paul Jones | 11-1-1 | 1999-09-24 |
| Paul Kelly | 14-5-0 | 2011-02-05 |
| Paul Redmond | 12-7-0 | 2015-07-18 |