| Fighter | Record | Last Bout |
|---|---|---|
| Zak Cummings | 25-7-0 | 2023-04-15 |
| Zak Ottow | 17-7-0 | 2019-03-09 |
| Zane Frazier | 4-11-0 | 1996-05-17 |
| Zarah Fairn | 6-6-0 | 2023-09-02 |
| Zarrukh Adashev | 4-4-0 | 2022-06-04 |
| Zelim Imadaev | 8-3-0 | 2020-09-05 |
| Zhalgas Zhumagulov | 14-9-0 | 2023-06-24 |
| Zhang Lipeng | 23-9-1 | 2015-05-16 |
| Zhang Mingyang | 19-8-0 | 2026-05-30 |
| Zhang Tiequan | 15-4-0 | 2012-11-10 |
| Zhang Weili | 26-4-0 | 2025-11-15 |
| Zhu Kangjie | 21-5-0 (1 NC) | 2026-05-30 |
| Zubaira Tukhugov | 20-6-1 | 2023-02-11 |
| Zviad Lazishvili | 13-1-0 | 2021-10-23 |
| Zygimantas Ramaska | 9-3-0 | 2024-09-07 |