Johnny Walker è un lottatore di MMA della categoria pesi mediomassimi. Il suo record nelle arti marziali miste è 22–10 (vittorie–sconfitte–pareggi). Scheda: 34 anni, altezza 196 cm, allungo 208 cm.
| Esito | Avversario | Metodo | Evento | Data |
|---|---|---|---|---|
| Loss | Dominick Reyes | Decision (split) | UFC 327 | April 11, 2026 |
| Win | Zhang Mingyang | TKO (leg kicks and punches) | UFC Fight Night: Walker vs. Zhang | August 23, 2025 |
| Loss | Volkan Oezdemir | KO (punch) | UFC on ABC: Whittaker vs. Aliskerov | June 22, 2024 |
| Loss | Magomed Ankalaev | KO (punches) | UFC Fight Night: Ankalaev vs. Walker 2 | January 13, 2024 |
| NC | Magomed Ankalaev | NC (illegal knee) | UFC 294 | October 21, 2023 |
| Win | Anthony Smith | Decision (unanimous) | UFC on ABC: Rozenstruik vs. Almeida | May 13, 2023 |
| Win | Paul Craig | TKO (punches) | UFC 283 | January 21, 2023 |
| Win | Ion Cuțelaba | Submission (rear-naked choke) | UFC 279 | September 10, 2022 |
| Loss | Jamahal Hill | KO (punch) | UFC Fight Night: Walker vs. Hill | February 19, 2022 |
| Loss | Thiago Santos | Decision (unanimous) | UFC Fight Night: Santos vs. Walker | October 2, 2021 |
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