| Fighter | Record | Last Bout |
|---|---|---|
| Aaron Phillips | 12-5-0 | 2023-04-15 |
| Alan Patrick | 15-4-0 (1 NC) | 2022-05-14 |
| Alejandro Perez | 23-9-1 | 2022-02-26 |
| Andre Pederneiras | 1-1-2 | 1999-07-16 |
| Anthony Perosh | 15-10-0 | 2015-11-14 |
| Anthony Pettis | 24-10-0 | 2020-12-19 |
| BJ Penn | 16-14-2 | 2019-05-11 |
| Bart Palaszewski | 36-17-0 | 2013-04-13 |
| Brad Pickett | 25-14-0 | 2017-03-18 |
| CM Punk | 0-1-0 (1 NC) | 2018-06-09 |
| Callan Potter | 18-9-0 | 2020-02-22 |
| Carlo Pedersoli Jr. | 11-3-0 | 2019-02-23 |
| Carlo Prater | 31-18-1 | 2012-10-05 |
| Cathal Pendred | 17-4-1 | 2015-10-24 |
| Chris Price | 19-4-0 | 2007-01-25 |
| Claude Patrick | 14-2-0 | 2011-12-10 |
| Cody Pfister | 13-6-1 | 2016-07-13 |
| Constantinos Philippou | 13-5-0 (1 NC) | 2015-05-16 |
| Damacio Page | 19-10-0 | 2012-07-11 |
| Devin Powell | 9-4-0 | 2018-11-17 |
| Domingo Pilarte | 8-3-0 (1 NC) | 2021-08-21 |
| Dorian Price | 8-5-0 | 2007-12-08 |
| Dustin Pague | 12-11-0 | 2013-10-19 |
| Elizabeth Phillips | 6-6-0 | 2016-08-20 |
| Erik Perez | 17-6-0 | 2016-11-05 |
| Estevan Payan | 16-12-0 (1 NC) | 2014-04-19 |
| Filip Pejic | 12-2-2 | 2016-04-10 |
| Forrest Petz | 26-10-0 | 2010-09-15 |
| Frankie Perez | 10-4-0 | 2017-07-22 |
| 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 |
| Hernani Perpetuo | 18-5-0 (1 NC) | 2014-07-26 |
| Igor Pokrajac | 28-13-0 (1 NC) | 2016-04-10 |
| Isabela de Padua | 5-2-0 | 2019-11-16 |
| 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 |
| Jesus Pinedo | 16-5-1 | 2019-03-23 |
| Joao Pierini | 4-1-0 | 2002-06-22 |
| Joe Pardo | 4-6-0 | 1998-05-15 |
| Joe Proctor | 11-5-0 | 2017-04-22 |
| John Phillips | 22-11-0 (1 NC) | 2020-10-17 |
| John Polakowski | 2-2-0 | 2008-12-13 |
| 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 |