| Fighter | Record | Last Bout |
|---|---|---|
| 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 |
| Augusto Mendes | 6-2-0 | 2017-04-15 |
| Augusto Montano | 15-3-0 | 2016-09-17 |
| Augusto Sakai | 16-5-1 | 2023-02-25 |
| Austin Arnett | 16-6-0 | 2019-02-09 |
| Austin Lingo | 9-3-0 | 2023-07-15 |
| Austin Springer | 12-4-0 | 2020-08-29 |
| Azamat Gashimov | 8-3-0 | 2013-05-18 |
| Azunna Anyanwu | 14-5-0 | 2017-09-16 |
| Ben Alloway | 18-8-0 | 2013-08-28 |
| Ben Askren | 19-2-0 (1 NC) | 2019-10-26 |
| Bill Algeo | 18-9-0 | 2024-07-20 |
| Cesar Arzamendia | 8-3-0 | 2016-07-30 |
| Chris Avila | 5-4-0 | 2016-11-05 |
| Christian Aguilera | 14-8-0 | 2021-05-08 |
| Collin Anglin | 8-3-0 | 2021-11-13 |
| Corey Anderson | 14-5-0 | 2020-02-15 |
| Cyril Asker | 9-4-0 | 2018-02-10 |
| Daichi Abe | 6-2-0 | 2018-06-23 |
| Danny Abbadi | 4-6-0 | 2006-09-23 |
| David Abbott | 10-15-0 | 2003-11-21 |
| Dylan Andrews | 18-7-0 (1 NC) | 2015-05-09 |
| Eddie Alvarez | 29-6-0 (1 NC) | 2018-07-28 |
| Ericka Almeida | 7-3-0 | 2015-10-24 |
| Felipe Arantes | 18-10-1 (2 NC) | 2018-06-23 |
| Gadzhimurad Antigulov | 20-8-0 | 2020-10-17 |
| Gilbert Aldana | 6-2-0 | 2006-07-08 |
| Hector Aldana | 4-3-0 | 2019-10-12 |
| Houston Alexander | 17-15-1 (2 NC) | 2009-12-05 |
| Hunter Azure | 9-2-0 | 2021-04-10 |
| Igor Araujo | 25-9-0 (1 NC) | 2015-07-15 |
| Ildemar Alcantara | 21-11-0 | 2015-07-15 |
| Iuri Alcantara | 35-10-0 (1 NC) | 2018-08-25 |
| Jermaine Andre | 14-4-0 | 2000-03-10 |
| Jessica Aguilar | 20-8-0 | 2019-03-30 |
| Jessin Ayari | 16-6-0 | 2020-10-03 |
| Jim Alers | 13-3-0 (1 NC) | 2016-07-23 |
| John Albert | 6-5-0 | 2013-07-27 |
| John Alessio | 35-17-0 (2 NC) | 2012-07-07 |
| John Allan | 13-7-0 (1 NC) | 2021-11-06 |
| Juan Adams | 5-3-0 | 2020-02-08 |
| Julio Arce | 19-6-0 | 2024-03-30 |
| Junior Albini | 14-6-0 | 2019-06-29 |
| Junior Assuncao | 16-6-0 | 2011-12-30 |
| Kevin Aguilar | 17-5-0 | 2021-05-15 |
| Khusein Askhabov | 23-1-0 | 2023-02-18 |
| Klidson Abreu | 15-4-0 (1 NC) | 2020-05-30 |