| Fighter | Record | Last Bout |
|---|---|---|
| AJ Dobson | 7-3-0 (1 NC) | 2024-03-23 |
| AJ Fletcher | 10-3-0 | 2023-09-23 |
| Aalon Cruz | 8-4-0 | 2021-03-06 |
| Aaron Brink | 26-26-0 (2 NC) | 2000-11-17 |
| Aaron Phillips | 12-5-0 | 2023-04-15 |
| Aaron Riley | 30-14-1 | 2013-07-27 |
| Aaron Rosa | 18-6-0 | 2012-03-02 |
| Aaron Simpson | 12-5-0 | 2012-10-05 |
| Aaron Wilkinson | 11-7-0 | 2010-12-04 |
| Abdul-Kerim Edilov | 17-4-0 | 2017-09-02 |
| Abel Trujillo | 15-8-0 (1 NC) | 2017-12-16 |
| Abner Lloveras | 20-9-1 | 2015-12-11 |
| Abu Azaitar | 14-4-1 | 2023-10-21 |
| Abubakar Nurmagomedov | 17-4-1 | 2023-06-03 |
| Adam Cella | 6-8-0 | 2013-04-06 |
| Adam Milstead | 8-4-0 | 2018-12-15 |
| Adam Wieczorek | 10-2-0 | 2018-11-03 |
| Adam Yandiev | 9-1-0 | 2018-09-15 |
| Adlan Amagov | 14-2-1 | 2013-10-19 |
| Adrian Serrano | 56-29-4 | 2000-06-09 |
| Adriano Martins | 28-9-0 | 2017-09-09 |
| Adriano Santos | 0-1-0 | 1998-10-16 |
| Aisling Daly | 16-6-0 | 2015-10-24 |
| Akbarh Arreola | 23-11-1 | 2015-11-14 |
| Akihiro Gono | 35-21-8 | 2009-01-31 |
| Akira Corassani | 12-6-0 (1 NC) | 2015-01-24 |
| Al Iaquinta | 14-7-1 | 2021-11-06 |
| Alan Baudot | 8-3-0 (2 NC) | 2022-06-25 |
| Alan Belcher | 18-8-0 | 2013-04-27 |
| Alan Jouban | 17-7-0 | 2020-11-21 |
| Alan Omer | 20-5-0 | 2015-06-20 |
| Alan Patrick | 15-4-0 (1 NC) | 2022-05-14 |
| Albert Cheng | 7-4-0 | 2014-03-01 |
| Albert Duraev | 16-5-0 | 2023-07-15 |
| Albert Morales | 7-4-1 | 2018-02-24 |
| Albert Tumenov | 18-4-0 | 2016-10-08 |
| Alberta Cerra Leon | 0-1-0 | 1994-03-11 |
| Alberto Crane | 15-5-0 | 2008-01-23 |
| Alberto Mina | 13-1-0 | 2018-05-12 |
| Alberto Uda | 12-2-0 | 2016-08-20 |
| Alejandro Perez | 23-9-1 | 2022-02-26 |
| Aleksa Camur | 6-3-0 | 2023-08-05 |
| Aleksandra Albu | 3-2-0 | 2019-10-26 |
| Aleksei Kunchenko | 20-2-0 | 2020-03-14 |
| Aleksei Oleinik | 60-17-1 | 2022-10-01 |
| Alen Amedovski | 8-4-0 | 2022-09-17 |
| Alessio Di Chirico | 13-7-0 | 2022-09-03 |
| Alessio Sakara | 19-11-0 (2 NC) | 2013-10-26 |
| Alex Andrade | 10-5-0 | 2000-06-09 |
| Alex Caceres | 21-15-0 (1 NC) | 2024-05-11 |