| Fighter | Record | Last Bout |
|---|---|---|
| Paulo Thiago | 18-9-0 | 2014-09-13 |
| Pawel Pawlak | 12-3-0 | 2015-07-18 |
| Pearl Gonzalez | 6-3-0 | 2017-10-07 |
| Pedro Nobre | 18-4-2 (1 NC) | 2013-01-19 |
| Pedro Rizzo | 20-11-0 | 2003-11-21 |
| Peggy Morgan | 4-4-0 | 2013-11-30 |
| Per Eklund | 14-5-1 | 2009-02-21 |
| Pete Rodriguez | 5-2-0 | 2024-02-03 |
| Pete Sell | 10-7-0 | 2009-03-07 |
| Pete Spratt | 25-23-0 | 2007-06-12 |
| Pete Williams | 12-6-0 | 2002-03-22 |
| Peter Barrett | 11-5-0 | 2020-12-12 |
| Peter Sobotta | 17-7-1 | 2020-07-25 |
| Phil Baroni | 15-18-0 | 2011-01-01 |
| Phil Davis | 17-4-0 (1 NC) | 2015-01-24 |
| Phil Harris | 22-12-0 (2 NC) | 2014-07-19 |
| Phil Hawes | 12-6-0 | 2024-01-13 |
| Phil Johns | 30-14-1 | 2001-02-23 |
| Philip De Fries | 12-6-0 (1 NC) | 2013-04-06 |
| Philipe Lins | 18-5-0 | 2024-03-09 |
| Phillip Miller | 16-0-0 | 2002-11-22 |
| Phillipe Nover | 11-8-1 | 2017-02-11 |
| Pingyuan Liu | 13-7-0 | 2019-12-21 |
| Piotr Hallmann | 18-6-0 | 2015-11-07 |
| Poliana Botelho | 8-5-0 | 2022-06-04 |
| Quinn Mulhern | 18-4-0 | 2014-01-04 |
| Quinton Jackson | 37-12-0 | 2015-04-25 |
| Rachael Ostovich | 4-6-0 | 2020-11-28 |
| Rafael Alves | 20-12-0 | 2023-02-25 |
| Rafael Carino | 2-1-1 | 1996-05-17 |
| Rafael Cavalcante | 12-7-0 (1 NC) | 2016-02-06 |
| Rafael Natal | 21-9-1 | 2017-07-22 |
| Rafaello Oliveira | 17-8-0 | 2014-02-22 |
| Rainy Martinez | 0-2-0 | 1997-02-07 |
| Ramazan Emeev | 20-6-0 | 2022-06-11 |
| Rameau Thierry Sokoudjou | 18-18-0 | 2008-10-18 |
| Ramiro Hernandez | 19-9-0 | 2014-01-25 |
| Ramona Pascual | 6-5-0 | 2022-11-05 |
| Ramsey Nijem | 9-6-0 | 2015-07-25 |
| Randa Markos | 11-12-1 | 2021-10-23 |
| Randy Costa | 6-4-0 | 2022-10-01 |
| Randy Couture | 19-11-0 | 2011-04-30 |
| Rani Yahya | 28-12-1 (1 NC) | 2024-04-27 |
| Raphael Assuncao | 28-10-0 | 2023-03-11 |
| Raphael Pessoa | 10-2-0 | 2020-07-25 |
| Rashad Coulter | 9-4-0 | 2018-11-24 |
| Rashad Evans | 19-8-1 | 2018-06-09 |
| Rashid Magomedov | 20-2-0 | 2017-04-15 |
| Raulian Paiva | 21-5-0 | 2022-06-25 |
| Ray Borg | 13-5-0 | 2020-05-13 |