
Fight night · UFC
Cortes Acosta and Walker weigh in at 9 a.m. in Las Vegas
The short-notice heavyweight main event is Saturday, November 7, at the Meta Apex, and the UFC lists Cortes Acosta at No. 6.
UFC · Heavyweight

23–10–01 NCNo contest. The result was voided, so it does not count as a win, a loss, or a draw.
18 KO · 3 SUB · 2 DEC
Johnny Walker fights at heavyweight in the UFC.
He knocked out Mick Parkin with a knee at 3:35 of the first round on October 3, 2026, in his heavyweight debut. The fight before it was a split decision loss to Dominick Reyes at light heavyweight. The no contest is an illegal knee by Magomed Ankalaev at UFC 294.
Belford Roxo is his birthplace, and he trains at Xtreme Couture in Las Vegas. The UFC athlete page still lists SBG Ireland, the gym he left in 2025. He holds a brown belt in Brazilian jiu-jitsu, earned a degree in engineering, and worked as an engineer. Caio is his son. He won a CBJJO world title at blue belt in the weight class and in the absolute, plus UCMMA and European Beatdown light heavyweight titles, and he turned pro in 2013.

Fight night · UFC
The short-notice heavyweight main event is Saturday, November 7, at the Meta Apex, and the UFC lists Cortes Acosta at No. 6.

Fight night · UFC
Walker took the short-notice main event against Cortes Acosta on Saturday, November 7, at the Meta Apex, and he says he can fight five or ten rounds.

Fight night · UFC
Walker meets Cortes Acosta in the main event on Saturday, November 7, at the Meta Apex. Valter has won five in a row, each by first-round submission.

Fight night · UFC
This is Cortes Acosta's first UFC main event, and Johnny Walker took the bout on short notice. Cortes Acosta is ranked sixth and has lost two in a row, and Johnny Walker is unbeaten at heavyweight.
| Date | Opponent | Result | Method | Round | Time | Event |
|---|---|---|---|---|---|---|
| Mick Parkin | Win | KO (knee)Performance of the Night. Heavyweight debut. | 1 | 3:35 | UFC 332 | |
| Dominick Reyes | Loss | Decision (split) | 3 | 5:00 | UFC 327 | |
| Zhang Mingyang | Win | TKO (leg kicks and punches)Performance of the Night. | 2 | 2:37 | UFC Fight Night: Walker vs. Zhang | |
| Volkan Oezdemir | Loss | KO (punch) | 1 | 2:28 | UFC on ABC: Whittaker vs. Aliskerov | |
| Magomed Ankalaev | Loss | KO (punches) | 2 | 2:42 | UFC Fight Night: Ankalaev vs. Walker 2 | |
| Magomed Ankalaev | No contest | No contestAccidental illegal knee. | 1 | 3:13 | UFC 294 | |
| Anthony Smith | Win | Decision (unanimous) | 3 | 5:00 | UFC on ABC: Rozenstruik vs. Almeida | |
| Paul Craig | Win | TKO (punches) | 1 | 2:16 | UFC 283 | |
| Ion Cuțelaba | Win | Submission (rear-naked choke)Performance of the Night. | 1 | 4:37 | UFC 279 | |
| Jamahal Hill | Loss | KO (punch) | 1 | 2:55 | UFC Fight Night: Walker vs. Hill | |
| Thiago Santos | Loss | Decision (unanimous) | 5 | 5:00 | UFC Fight Night: Santos vs. Walker | |
| Ryan Spann | Win | KO (elbows and punches) | 1 | 2:43 | UFC Fight Night: Covington vs. Woodley | |
| Nikita Krylov | Loss | Decision (unanimous) | 3 | 5:00 | UFC Fight Night: Lee vs. Oliveira | |
| Corey Anderson | Loss | TKO (punches) | 1 | 2:07 | UFC 244 | |
| Misha Cirkunov | Win | TKO (flying knee and punches)Performance of the Night. | 1 | 0:36 | UFC 235 | |
| Justin Ledet | Win | TKO (spinning backfist and punches)Performance of the Night. | 1 | 0:15 | UFC Fight Night: Assunção vs. Moraes 2 | |
| Khalil Rountree Jr. | Win | KO (elbow)Performance of the Night. | 1 | 1:57 | UFC Fight Night: Magny vs. Ponzinibbio | |
| Henrique da Silva | Win | Decision (unanimous) | 3 | 5:00 | Dana White's Contender Series Brazil 2 | |
| Cheick Kone | Win | TKO (punches)Won the EBD light heavyweight title. | 1 | 3:04 | European Beatdown 3 | |
| Jędrzej Maćkowiak | Win | KO (knee and punches)Heavyweight bout. | 2 | 2:42 | Krwawy Sport 1 | |
| Stuart Austin | Win | KO (knee)Won the UCMMA light heavyweight title. | 1 | 2:44 | Ultimate Challenge MMA 54 | |
| Rodrigo Jesus | Win | TKO (punches) | 1 | 2:18 | Brave CF 8 | |
| Luis Guilherme de Andrade | Win | Submission (guillotine choke)Return to light heavyweight. | 1 | 0:29 | Katana Fight: Gold Edition | |
| Henrique Silva Lopes | Loss | KO (punches) | 1 | 0:18 | Jungle Fight 88 | |
| Fábio Vasconcelos | Win | TKO (punches) | 1 | 4:10 | Imortal FC 4 | |
| Klidson Abreu | Loss | Submission (rear-naked choke)Heavyweight debut. For the vacant Samurai FC heavyweight title. | 2 | 3:10 | Samurai FC 12 | |
| Murilo Grittz | Win | TKO (punches) | 1 | 0:56 | PRVT: Garuva Top Fight | |
| Marck Polimeno | Win | Submission (rear-naked choke) | 1 | 0:38 | PRVT: Afonso Pena Top Fight 3 | |
| Ricardo Pandora | Win | TKO (punches) | 1 | 3:20 | Imortal FC 1 | |
| Andrew Flores Smith | Win | TKO (punches) | 3 | 0:28 | Peru FC 21 | |
| Wagner Prado | Loss | TKO (punches) | 2 | 3:40 | Circuito Team Nogueira MMA Beach 1 | |
| João Vitor Lopes da Silva | Win | TKO (punches)Time was not published. | 1 | — | Gigante Fight MMA 2 | |
| Vitor Casanova | Win | TKO (punches) | 1 | 4:38 | Ubá Fight 5 | |
| Francisco Francisco | Win | TKO (knees and punches) | 1 | 0:49 | Circuito Invictus de MMA 2 |