| Fighter | Record | Last Bout |
|---|---|---|
| Wang Guan | 20-1-1 | 2017-11-25 |
| War Machine | 14-5-0 | 2008-05-24 |
| Warlley Alves | 15-8-0 | 2024-05-18 |
| Waylon Lowe | 16-7-0 (2 NC) | 2011-03-26 |
| Wellington Turman | 18-8-0 | 2023-12-02 |
| Wendell Oliveira Marques | 29-10-0 | 2015-05-30 |
| Wes Albritton | 0-1-0 | 1997-05-30 |
| Wes Combs | 20-6-0 | 2006-08-26 |
| Wes Schultz | 9-4-0 | 2026-08-22 |
| Wes Sims | 24-14-1 (2 NC) | 2004-04-02 |
| Wesley Correira | 20-16-0 | 2004-04-02 |
| Westin Wilson | 17-10-0 | 2025-08-23 |
| Will Brooks | 18-4-0 | 2017-11-18 |
| Will Campuzano | 14-6-0 | 2014-03-15 |
| Will Chope | 34-13-0 | 2014-01-04 |
| Willamy Freire | 26-6-0 | 2011-01-22 |
| William Gomis | 15-4-0 | 2026-05-09 |
| William Knight | 11-5-0 | 2023-02-18 |
| William Macario | 9-3-0 | 2015-02-22 |
| Willie Gates | 12-7-0 | 2016-05-08 |
| Wilson Gouveia | 14-8-0 | 2009-12-12 |
| Wilson Reis | 23-10-0 | 2019-04-13 |
| Wu Yanan | 13-6-0 | 2022-08-20 |
| Wulijiburen | 20-9-0 | 2019-02-09 |
| Zhang Weili | 26-4-0 | 2025-11-15 |