| 2026-10-03 | UFC 332: Silva vs. Wang | Lightweight | Alexander Hernandez def. Rafael dos Anjos | TKO (punches) | 2 | 3:12 |
| 2026-04-25 | UFC Fight Night: Sterling vs. Zalal | Lightweight | Rafa García def. Alexander Hernandez | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2025-09-13 | UFC Fight Night: Lopes vs. Silva | Lightweight | Alexander Hernandez def. Carlos Diego Ferreira | TKO (punches) | 2 | 3:46 |
| 2025-08-16 | UFC 319: du Plessis vs. Chimaev | Lightweight | Alexander Hernandez def. Chase Hooper | TKO (punches) | 1 | 4:58 |
| 2025-03-15 | UFC Fight Night: Vettori vs. Dolidze 2 | Lightweight | Alexander Hernandez def. Kurt Holobaugh | Decision (unanimous) (29–28, 30–27, 29–28) | 3 | 5:00 |
| 2024-10-05 | UFC 307: Pereira vs. Rountree Jr. | Lightweight | Alexander Hernandez def. Austin Hubbard | Decision (split) (27–30, 29–28, 29–28) | 3 | 5:00 |
| 2024-04-06 | UFC Fight Night: Allen vs. Curtis 2 | Catchweight | Damon Jackson def. Alexander Hernandez | Decision (split) (27–30, 29–28, 29–28) | 3 | 5:00 |
| 2023-10-07 | UFC Fight Night: Dawson vs. Green | Featherweight | Bill Algeo def. Alexander Hernandez | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2023-02-18 | UFC Fight Night: Andrade vs. Blanchfield | Lightweight | Alexander Hernandez def. Jim Miller | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2022-12-10 | UFC 282: Błachowicz vs. Ankalaev | Featherweight | Billy Quarantillo def. Alexander Hernandez | TKO (knees and punches) | 2 | 4:30 |
| 2022-02-12 | UFC 271: Adesanya vs. Whittaker 2 | Lightweight | Renato Moicano def. Alexander Hernandez | Submission (rear-naked choke) | 2 | 1:23 |
| 2021-10-02 | UFC Fight Night: Santos vs. Walker | Catchweight | Alexander Hernandez def. Mike Breeden | KO (punch) | 1 | 1:20 |
| 2021-02-27 | UFC Fight Night: Rozenstruik vs. Gane | Lightweight | Thiago Moisés def. Alexander Hernandez | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2020-10-31 | UFC Fight Night: Hall vs. Silva | Lightweight | Alexander Hernandez def. Chris Gruetzemacher | KO (punches) | 1 | 1:46 |
| 2020-05-13 | UFC Fight Night: Smith vs. Teixeira | Lightweight | Drew Dober def. Alexander Hernandez | TKO (punches) | 2 | 4:25 |
| 2019-07-20 | UFC on ESPN: dos Anjos vs. Edwards | Lightweight | Alexander Hernandez def. Francisco Trinaldo | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2019-01-19 | UFC Fight Night: Cejudo vs. Dillashaw | Lightweight | Donald Cerrone def. Alexander Hernandez | TKO (head kick and punches) | 2 | 3:43 |
| 2018-07-28 | UFC on Fox: Alvarez vs. Poirier 2 | Lightweight | Alexander Hernandez def. Olivier Aubin-Mercier | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2018-03-03 | UFC 222: Cyborg vs. Kunitskaya | Lightweight | Alexander Hernandez def. Beneil Dariush | KO (punch) | 1 | 0:42 |