| 2026-08-29 | UFC Fight Night: Nurmagomedov vs. Song | Flyweight | Su Mudaerji def. Alex Perez | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2026-05-30 | UFC Fight Night: Song vs. Figueiredo | Flyweight | Alex Perez vs. Su Mudaerji | NC (accidental groin kick) | 2 | 1:45 |
| 2026-01-24 | UFC 324: Gaethje vs. Pimblett | Catchweight | Alex Perez def. Charles Johnson | TKO (punches) | 1 | 3:16 |
| 2025-11-22 | UFC Fight Night: Tsarukyan vs. Hooker | Flyweight | Asu Almabayev def. Alex Perez | Submission (guillotine choke) | 3 | 0:22 |
| 2024-06-15 | UFC on ESPN: Perez vs. Taira | Flyweight | Tatsuro Taira def. Alex Perez | TKO (knee injury) | 2 | 2:59 |
| 2024-04-27 | UFC on ESPN: Nicolau vs. Perez | Flyweight | Alex Perez def. Matheus Nicolau | KO (punch) | 2 | 2:16 |
| 2024-03-02 | UFC Fight Night: Rozenstruik vs. Gaziev | Flyweight | Muhammad Mokaev def. Alex Perez | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2022-07-30 | UFC 277: Peña vs. Nunes 2 | Flyweight | Alexandre Pantoja def. Alex Perez | Submission (neck crank) | 1 | 1:31 |
| 2020-11-21 | UFC 255: Figueiredo vs. Perez | Flyweight | Deiveson Figueiredo def. Alex Perez title | Submission (guillotine choke) | 1 | 1:57 |
| 2020-06-06 | UFC 250: Nunes vs. Spencer | Flyweight | Alex Perez def. Jussier Formiga | TKO (leg kicks) | 1 | 4:06 |
| 2020-01-25 | UFC Fight Night: Blaydes vs. dos Santos | Flyweight | Alex Perez def. Jordan Espinosa | Technical Submission (arm-triangle choke) | 1 | 2:33 |
| 2019-03-30 | UFC on ESPN: Barboza vs. Gaethje | Bantamweight | Alex Perez def. Mark De La Rosa | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2018-11-30 | The Ultimate Fighter: Heavy Hitters Finale | Flyweight | Joseph Benavidez def. Alex Perez | TKO (punches) | 1 | 4:19 |
| 2018-08-04 | UFC 227: Dillashaw vs. Garbrandt 2 | Flyweight | Alex Perez def. Jose Torres | KO (punches) | 1 | 3:36 |
| 2018-02-24 | UFC on Fox: Emmett vs. Stephens | Catchweight | Alex Perez def. Eric Shelton | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2017-12-09 | UFC Fight Night: Swanson vs. Ortega | Bantamweight | Alex Perez def. Carls John de Tomas | Submission (D'Arce choke) | 2 | 1:54 |