| Fighter | Record | Last Bout |
|---|---|---|
| Andreas Michailidis | 13-6-0 | 2022-06-04 |
| Andreas Stahl | 10-4-0 | 2015-12-10 |
| Andrei Arlovski | 34-24-0 (2 NC) | 2024-06-29 |
| Andrei Semenov | 34-9-2 | 2002-05-10 |
| Andrew Craig | 9-4-0 | 2015-07-15 |
| Andrew Holbrook | 12-3-0 | 2017-09-02 |
| Andrew Sanchez | 13-7-0 | 2021-10-16 |
| Andy Anderson | 0-1-0 | 1995-04-07 |
| Andy Enz | 10-4-0 | 2015-01-31 |
| Andy Ogle | 9-6-0 | 2015-01-24 |
| Andy Wang | 7-8-1 (1 NC) | 2007-06-23 |
| Angela Magana | 11-9-0 | 2017-12-02 |
| Anistavio Medeiros | 19-10-0 | 2012-06-23 |
| Anna Elmose | 3-2-0 | 2016-11-19 |
| Ansar Chalangov | 14-5-0 | 2006-04-06 |
| Anthony Birchak | 16-8-0 | 2021-04-17 |
| Anthony Christodoulou | 12-7-0 | 2015-08-08 |
| Anthony Hamilton | 15-9-0 | 2017-11-18 |
| Anthony Ivy | 8-4-0 | 2020-09-12 |
| Anthony Johnson | 22-6-0 | 2017-04-08 |
| Anthony Lapsley | 23-7-0 (2 NC) | 2014-05-10 |
| Anthony Macias | 26-18-0 | 1995-07-14 |
| Anthony Njokuani | 16-12-0 (1 NC) | 2014-10-04 |
| Anthony Perosh | 15-10-0 | 2015-11-14 |
| Anthony Pettis | 24-10-0 | 2020-12-19 |
| Anthony Rocco Martin | 17-6-0 | 2020-06-06 |
| Anthony Torres | 5-3-0 | 2007-09-08 |
| Anton Kuivanen | 24-10-0 | 2013-02-23 |
| Anton Turkalj | 8-4-0 | 2024-03-30 |
| Anton Zafir | 7-3-0 | 2016-07-08 |
| Antoni Hardonk | 8-6-0 | 2009-10-24 |
| Antonina Shevchenko | 10-4-0 | 2022-07-09 |
| Antonio Arroyo | 9-5-0 | 2021-09-18 |
| Antonio Banuelos | 20-11-1 | 2011-02-05 |
| Antonio Braga Neto | 9-3-0 (1 NC) | 2017-12-09 |
| Antonio Carlos Junior | 11-5-0 (1 NC) | 2021-01-23 |
| Antonio Carvalho | 15-6-0 | 2013-03-16 |
| Antonio Dos Santos | 6-4-0 | 2015-06-20 |
| Antonio McKee | 29-6-2 | 2011-01-01 |
| Antonio Mendes | 18-13-0 | 2009-01-17 |
| Antonio Rodrigo Nogueira | 34-10-1 (1 NC) | 2015-08-01 |
| Antonio Silva | 19-12-1 | 2016-09-24 |
| Anying Wang | 2-1-0 | 2014-08-23 |
| Ariel Beck | 4-5-0 | 2017-12-01 |
| Arjan Bhullar | 9-1-0 | 2019-05-04 |
| Artem Lobov | 13-15-1 (1 NC) | 2018-10-27 |
| 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 |