| 2022-02-26 | UFC Fight Night: Makhachev vs. Green | Featherweight | Jonathan Martinez def. Alejandro Pérez | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2021-10-02 | UFC Fight Night: Santos vs. Walker | Bantamweight | Alejandro Pérez def. Johnny Eduardo | Submission (scarf hold armlock) | 2 | 4:13 |
| 2019-07-06 | UFC 239: Jones vs. Santos | Bantamweight | Song Yadong def. Alejandro Pérez | KO (punch) | 1 | 2:04 |
| 2019-03-02 | UFC 235: Jones vs. Smith | Bantamweight | Cody Stamann def. Alejandro Pérez | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2018-07-14 | UFC Fight Night: dos Santos vs. Ivanov | Bantamweight | Alejandro Pérez def. Eddie Wineland | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2018-04-14 | UFC on Fox: Poirier vs. Gaethje | Bantamweight | Alejandro Pérez def. Matthew Lopez | TKO (knees and punches) | 2 | 3:42 |
| 2017-12-09 | UFC Fight Night: Swanson vs. Ortega | Bantamweight | Alejandro Pérez def. Iuri Alcântara | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2017-08-05 | UFC Fight Night: Pettis vs. Moreno | Bantamweight | Alejandro Pérez def. Andre Soukhamthath | Decision (split) (28–29, 29–28, 29–28) | 3 | 5:00 |
| 2016-09-17 | UFC Fight Night: Poirier vs. Johnson | Bantamweight | Albert Morales vs. Alejandro Pérez | Draw (majority) (29–27, 28–28, 28–28) | 3 | 5:00 |
| 2016-04-10 | UFC Fight Night: Rothwell vs. dos Santos | Bantamweight | Alejandro Pérez def. Ian Entwistle | Verbal Submission (strikes) | 1 | 4:04 |
| 2015-11-21 | The Ultimate Fighter Latin America 2 Finale: Magny vs. Gastelum | Bantamweight | Alejandro Pérez def. Scott Jorgensen | TKO (ankle injury) | 2 | 4:26 |
| 2015-06-13 | UFC 188: Velasquez vs. Werdum | Bantamweight | Patrick Williams def. Alejandro Pérez | Technical Submission (standing guillotine choke) | 1 | 0:23 |
| 2014-11-15 | UFC 180: Werdum vs. Hunt | Bantamweight | Alejandro Pérez def. José Alberto Quiñónez | Decision (unanimous) (29–26, 29–26, 28–27) | 3 | 5:00 |