| Fighter | Record | Last Bout |
|---|---|---|
| Keith Wisniewski | 28-15-1 | 2013-09-04 |
| Khama Worthy | 16-9-0 | 2021-10-23 |
| Khaos Williams | 16-5-0 | 2026-10-03 |
| Kyle Watson | 13-8-1 | 2011-04-30 |
| Malcolm Wellmaker | 10-2-0 | 2026-05-16 |
| Marcin Wrzosek | 12-4-0 | 2015-12-11 |
| Mark Weir | 21-18-1 | 2003-04-25 |
| Matt Wiman | 16-10-0 | 2020-12-05 |
| Michelle Waterson-Gomez | 18-13-0 | 2024-06-29 |
| Mike Wessel | 15-8-0 | 2008-12-27 |
| Mike Whitehead | 27-8-0 | 2006-02-04 |
| Mike Wilkinson | 9-4-0 | 2016-02-27 |
| Nathaniel Wood | 23-7-0 | 2026-09-05 |
| Neil Wain | 13-4-0 | 2008-10-18 |
| Orlando Wiet | 1-5-0 | 1994-03-11 |
| Patrick Walsh | 10-3-0 | 2015-02-14 |
| Patrick Williams | 8-6-0 | 2018-04-14 |
| Pete Williams | 12-6-0 | 2002-03-22 |
| Ray Wizard | 0-1-0 | 1994-03-11 |
| Richard Walsh | 9-5-0 | 2016-11-26 |
| Rob Wilkinson | 11-2-0 | 2018-02-10 |
| Robert Whiteford | 14-4-0 | 2016-04-10 |
| Robert Whittaker | 28-9-0 | 2026-07-11 |
| Rodney Wallace | 26-15-1 | 2010-08-07 |
| Ron Waterman | 16-6-2 | 2000-04-14 |
| Royston Wee | 4-1-0 | 2015-05-16 |
| Sai Wang | 20-6-1 | 2014-08-23 |
| Sean Woodson | 14-2-1 | 2026-08-29 |
| Sheldon Westcott | 10-3-1 | 2016-01-02 |
| TJ Waldburger | 16-9-0 | 2014-02-22 |
| Tedd Williams | 7-1-0 | 2000-09-22 |
| Terrion Ware | 17-9-0 | 2018-09-15 |
| Tim Williams | 15-5-0 | 2018-08-25 |
| Tom Watson | 17-9-0 | 2015-08-08 |
| Travis Wiuff | 75-21-0 (1 NC) | 2005-04-16 |
| Trey Waters | 9-2-0 | 2025-09-06 |
| Tyron Woodley | 19-7-1 | 2021-03-27 |
| Val Woodburn | 7-2-0 | 2024-02-17 |
| Valter Walker | 16-1-0 | 2026-07-25 |
| Vernon White | 26-33-2 | 2004-08-21 |
| Wade Shipp | 11-5-0 | 2004-04-02 |
| Wagner Campos | 12-10-0 | 2012-06-23 |
| Wagner Prado | 12-3-0 (1 NC) | 2013-01-19 |
| Wagner Silva | 6-3-0 | 2014-11-08 |
| Waldo Cortes Acosta | 17-3-0 | 2026-09-12 |
| Walel Watson | 14-10-0 | 2012-09-22 |
| Wallid Ismail | 9-3-0 | 1997-02-07 |
| Walt Harris | 13-10-0 (1 NC) | 2021-06-05 |
| Wanderlei Silva | 35-13-1 (1 NC) | 2013-03-02 |
| Wang Cong | 10-1-0 | 2026-10-03 |