| Fighter | Record | Last Bout |
|---|---|---|
| Anying Wang | 2-1-0 | 2014-08-23 |
| Aoriqileng | 26-14-0 (1 NC) | 2026-08-29 |
| Ariane Carnelossi | 15-5-0 | 2026-06-06 |
| Ariane da Silva | 17-11-0 | 2025-06-07 |
| Ariel Beck | 4-5-0 | 2017-12-01 |
| Arjan Bhullar | 9-1-0 | 2019-05-04 |
| Arman Tsarukyan | 23-3-0 | 2026-09-19 |
| Armen Petrosyan | 9-5-0 | 2025-03-08 |
| Arnold Allen | 21-4-0 | 2026-10-24 |
| Artem Lobov | 13-15-1 (1 NC) | 2018-10-27 |
| Artur Minev | 7-1-0 | 2026-05-16 |
| Asbel Cancio | 0-1-0 | 1995-04-07 |
| Ashkan Mokhtarian | 13-3-0 | 2017-11-18 |
| Ashlee Evans-Smith | 6-6-0 | 2023-07-15 |
| Ashley Yoder | 8-9-0 | 2023-10-14 |
| Askar Askarov | 14-1-1 | 2022-03-26 |
| Askar Mozharov | 19-13-0 | 2022-06-04 |
| Aspen Ladd | 9-3-0 | 2022-04-09 |
| Assuerio Silva | 16-8-0 (1 NC) | 2007-04-21 |
| Asu Almabayev | 24-3-0 | 2026-06-27 |
| Ateba Gautier | 11-1-0 | 2026-10-03 |
| Augusto Mendes | 6-2-0 | 2017-04-15 |
| Augusto Montano | 15-3-0 | 2016-09-17 |
| Augusto Sakai | 16-5-1 | 2023-02-25 |
| Austen Lane | 13-8-0 (1 NC) | 2026-03-21 |
| Austin Arnett | 16-6-0 | 2019-02-09 |
| Austin Bashi | 14-2-0 | 2026-07-18 |
| Austin Hubbard | 17-10-0 | 2025-08-23 |
| Austin Lingo | 9-3-0 | 2023-07-15 |
| Austin Springer | 12-4-0 | 2020-08-29 |
| Austin Vanderford | 13-3-0 | 2025-10-04 |
| Axel Sola | 13-1-1 | 2026-09-05 |
| Azamat Bekoev | 20-5-0 | 2026-04-04 |
| Azamat Gashimov | 8-3-0 | 2013-05-18 |
| Azamat Murzakanov | 16-1-0 | 2026-10-24 |
| Azat Maksum | 15-3-0 | 2025-10-25 |
| Azunna Anyanwu | 14-5-0 | 2017-09-16 |
| Baergeng Jieleyisi | 18-7-0 | 2024-11-23 |
| Baisangur Susurkaev | 12-0-0 | 2026-05-09 |
| Barb Honchak | 10-4-0 | 2018-07-06 |
| Bart Palaszewski | 36-17-0 | 2013-04-13 |
| Bartosz Fabinski | 15-5-0 | 2021-04-17 |
| Bas Rutten | 28-4-1 | 1999-05-07 |
| Bassil Hafez | 9-4-1 | 2024-11-16 |
| Batgerel Danaa | 12-5-0 | 2023-04-22 |
| Bea Malecki | 4-1-0 | 2021-08-21 |
| Bec Rawlings | 7-8-0 | 2018-04-07 |
| Bekzat Almakhan | 12-4-0 | 2026-06-27 |
| Belal Muhammad | 24-6-0 (1 NC) | 2026-06-06 |
| Ben Alloway | 18-8-0 | 2013-08-28 |