| Fighter | Record | Last Bout |
|---|---|---|
| Michael Page | 26-3-0 | 2026-09-05 |
| Michael Patt | 12-4-0 | 2009-03-07 |
| Michel Pereira | 32-15-0 (2 NC) | 2026-06-27 |
| Michel Prazeres | 26-4-0 | 2021-06-26 |
| Mick Parkin | 10-1-0 | 2026-10-03 |
| 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 |
| Niko Price | 16-11-0 (2 NC) | 2026-03-28 |
| 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 |
| Ovince Saint Preux | 27-18-0 | 2024-10-05 |
| Pablo Garza | 12-4-0 | 2013-04-06 |
| Paddy Holohan | 12-2-1 | 2015-10-24 |
| Paddy Pimblett | 24-4-0 | 2026-07-11 |
| 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 Sabatini | 22-5-0 | 2026-05-09 |
| Pat Schilling | 5-2-0 | 2012-06-01 |
| Patchy Mix | 20-3-0 | 2025-10-04 |
| Patricio Pitbull | 37-9-0 | 2026-09-19 |
| 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 Craig | 17-10-1 (1 NC) | 2025-09-06 |
| 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 |
| Paul Rodriguez | 10-9-2 | 2001-06-29 |
| Paul Sass | 14-2-0 | 2013-02-16 |