| Fighter | Record | Last Bout |
|---|---|---|
| Fredson Paixao | 10-5-0 (1 NC) | 2010-12-04 |
| Gaetano Pirrello | 15-7-1 | 2021-10-02 |
| Gloria de Paula | 6-5-0 | 2022-06-18 |
| Godofredo Pepey | 13-6-0 | 2018-01-27 |
| Grigory Popov | 13-3-0 | 2019-11-09 |
| Guilherme Pat | 6-2-0 | 2026-08-08 |
| Hernani Perpetuo | 18-5-0 (1 NC) | 2014-07-26 |
| HyunSung Park | 10-2-0 | 2025-10-18 |
| Igor Pokrajac | 28-13-0 (1 NC) | 2016-04-10 |
| Ihor Potieria | 20-8-0 | 2025-01-11 |
| Isabela de Padua | 5-2-0 | 2019-11-16 |
| Ivana Petrovic | 7-3-0 | 2025-05-03 |
| Jamal Pogues | 11-5-0 | 2025-02-01 |
| Jamie Pickett | 13-11-0 | 2024-03-02 |
| Jared Papazian | 20-13-0 (1 NC) | 2012-12-15 |
| Jay Perrin | 10-7-0 | 2022-12-10 |
| Jens Pulver | 27-19-1 | 2007-06-23 |
| Jessica Penne | 14-9-0 | 2024-10-19 |
| Jesus Pinedo | 16-5-1 | 2019-03-23 |
| Jiri Prochazka | 32-6-1 | 2026-04-11 |
| Joao Pierini | 4-1-0 | 2002-06-22 |
| Joe Pardo | 4-6-0 | 1998-05-15 |
| Joe Proctor | 11-5-0 | 2017-04-22 |
| Joe Pyfer | 16-3-0 | 2026-03-28 |
| John Phillips | 22-11-0 (1 NC) | 2020-10-17 |
| John Polakowski | 2-2-0 | 2008-12-13 |
| Jonathan Pearce | 14-7-0 | 2024-10-12 |
| Jonny Parsons | 9-3-0 | 2023-07-22 |
| Jorge Patino | 38-19-2 (2 NC) | 1999-01-08 |
| Josh Parisian | 15-8-0 | 2024-03-09 |
| Juan Manuel Puig | 11-4-0 | 2014-11-22 |
| Julia Polastri | 15-6-0 | 2026-08-29 |
| Julianna Pena | 13-6-0 | 2025-06-07 |
| Julio Paulino | 23-5-0 | 2010-09-25 |
| JunYong Park | 19-7-0 | 2025-10-25 |
| Karo Parisyan | 24-11-0 (1 NC) | 2010-11-20 |
| Kurt Pellegrino | 16-7-0 | 2011-03-19 |
| Kyle Prepolec | 18-11-0 | 2026-08-01 |
| Kyler Phillips | 12-5-0 | 2026-04-18 |
| Lara Procopio | 7-2-0 | 2021-06-19 |
| Larissa Pacheco | 10-2-0 | 2015-03-14 |
| Luana Pinheiro | 11-5-0 | 2025-05-17 |
| 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 |
| Marcin Prachnio | 17-9-0 | 2025-07-19 |
| Marco Polo Reyes | 8-7-0 | 2019-09-21 |
| Mario Pinto | 13-0-0 | 2026-09-05 |
| Markus Perez | 12-5-0 | 2021-01-20 |