| Fighter | Record | Last Bout |
|---|---|---|
| Alibi Idiris | 11-1-0 (1 NC) | 2026-02-21 |
| Dan Ige | 19-11-0 | 2026-09-12 |
| Ian Machado Garry | 17-2-0 | 2026-08-15 |
| Iasmin Lucindo | 18-6-0 | 2025-08-09 |
| Ibo Aslan | 14-4-0 | 2025-12-06 |
| Ignacio Bahamondes | 17-7-0 | 2026-09-12 |
| Ihor Potieria | 20-8-0 | 2025-01-11 |
| Ikram Aliskerov | 18-2-0 | 2026-06-27 |
| Ilia Topuria | 17-1-0 | 2026-06-14 |
| Ilimbek Akylbek Uulu | 10-3-0 | 2026-09-26 |
| Imanol Rodriguez | 7-0-0 | 2026-10-03 |
| Ion Cutelaba | 20-12-1 (1 NC) | 2026-06-20 |
| Irene Aldana | 15-8-0 | 2024-09-14 |
| Irina Alekseeva | 5-4-0 | 2025-10-11 |
| Isaac Dulgarian | 7-2-0 | 2025-11-01 |
| Isaac Thomson | 9-3-0 | 2025-12-13 |
| Islam Dulatov | 12-1-0 | 2025-07-19 |
| Islam Makhachev | 29-1-0 | 2026-08-15 |
| Ismael Bonfim | 20-7-0 | 2026-07-25 |
| Ismail Naurdiev | 25-8-0 | 2026-10-03 |
| Israel Adesanya | 24-6-0 | 2026-03-28 |
| Istela Nunes | 6-6-0 (1 NC) | 2025-04-05 |
| Ivan Erslan | 15-6-0 (1 NC) | 2026-05-16 |
| Ivana Petrovic | 7-3-0 | 2025-05-03 |
| Iwo Baraniewski | 9-0-0 | 2026-09-19 |
| Kai Kamaka III | 18-8-1 | 2026-07-11 |
| Nassourdine Imavov | 17-4-0 (1 NC) | 2025-09-06 |
| Saygid Izagakhmaev | 22-4-0 | 2026-07-25 |
| Sean King III | 6-0-0 | 2026-09-12 |
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