| Fighter | Record | Last Bout |
|---|---|---|
| Allan Zuniga | 13-1-0 | 2018-07-06 |
| Anton Zafir | 7-3-0 | 2016-07-08 |
| Cat Zingano | 10-4-0 | 2018-12-29 |
| David Zawada | 17-7-0 | 2021-09-04 |
| Igor Zinoviev | 4-1-2 | 1998-03-13 |
| James Zikic | 21-10-2 | 2002-07-13 |
| Joao Zeferino | 21-9-0 | 2013-09-04 |
| Luke Zachrich | 14-4-0 | 2014-11-07 |
| Roger Zapata | 4-2-0 | 2015-09-26 |
| Yao Zhikui | 2-4-0 | 2016-11-26 |
| Zabit Magomedsharipov | 18-1-0 | 2019-11-09 |
| Zac Pauga | 7-3-0 | 2024-02-10 |
| Zach Light | 9-11-0 | 2002-06-22 |
| Zach Makovsky | 20-8-0 | 2016-12-10 |
| 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 Tiequan | 15-4-0 | 2012-11-10 |
| Zubaira Tukhugov | 20-6-1 | 2023-02-11 |
| Zviad Lazishvili | 13-1-0 | 2021-10-23 |
| Zygimantas Ramaska | 9-3-0 | 2024-09-07 |
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