| 2026-10-10 | UFC Fight Night: Allen vs. Duncan | Middleweight | Brendan Allen def. Christian Leroy Duncan | Submission (rear-naked choke) | 5 | 2:46 |
| 2026-06-06 | UFC Fight Night: Muhammad vs. Bonfim | Middleweight | Brendan Allen def. Edmen Shahbazyan | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2025-10-18 | UFC Fight Night: de Ridder vs. Allen | Middleweight | Brendan Allen def. Reinier de Ridder | TKO (corner stoppage) | 4 | 5:00 |
| 2025-07-19 | UFC 318: Holloway vs. Poirier 3 | Middleweight | Brendan Allen def. Marvin Vettori | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2025-02-22 | UFC Fight Night: Cejudo vs. Song | Middleweight | Anthony Hernandez def. Brendan Allen | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2024-09-28 | UFC Fight Night: Moicano vs. Saint Denis | Middleweight | Nassourdine Imavov def. Brendan Allen | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2024-04-06 | UFC Fight Night: Allen vs. Curtis 2 | Middleweight | Brendan Allen def. Chris Curtis | Decision (split) (47–48, 48–47, 49–46) | 5 | 5:00 |
| 2023-11-18 | UFC Fight Night: Allen vs. Craig | Middleweight | Brendan Allen def. Paul Craig | Submission (rear-naked choke) | 3 | 0:38 |
| 2023-06-24 | UFC on ABC: Emmett vs. Topuria | Middleweight | Brendan Allen def. Bruno Silva | Submission (rear-naked choke) | 1 | 4:39 |
| 2023-02-25 | UFC Fight Night: Muniz vs. Allen | Middleweight | Brendan Allen def. André Muniz | Submission (rear-naked choke) | 3 | 4:25 |
| 2022-10-01 | UFC Fight Night: Dern vs. Yan | Middleweight | Brendan Allen def. Krzysztof Jotko | Submission (rear-naked choke) | 1 | 4:17 |
| 2022-06-12 | UFC 275: Teixeira vs. Procházka | Middleweight | Brendan Allen def. Jacob Malkoun | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2022-02-05 | UFC Fight Night: Hermansson vs. Strickland | Light Heavyweight | Brendan Allen def. Sam Alvey | Submission (rear-naked choke) | 2 | 2:10 |
| 2021-12-04 | UFC on ESPN: Font vs. Aldo | Middleweight | Chris Curtis def. Brendan Allen | TKO (punches and knees) | 2 | 1:58 |
| 2021-07-24 | UFC on ESPN: Sandhagen vs. Dillashaw | Middleweight | Brendan Allen def. Punahele Soriano | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2021-04-24 | UFC 261: Usman vs. Masvidal 2 | Middleweight | Brendan Allen def. Karl Roberson | Submission (ankle lock) | 1 | 4:55 |
| 2020-11-14 | UFC Fight Night: Felder vs. dos Anjos | Catchweight | Sean Strickland def. Brendan Allen | TKO (punches) | 2 | 1:32 |
| 2020-06-27 | UFC on ESPN: Poirier vs. Hooker | Middleweight | Brendan Allen def. Kyle Daukaus | Decision (unanimous) (29–28, 29–27, 30–27) | 3 | 5:00 |
| 2020-02-29 | UFC Fight Night: Benavidez vs. Figueiredo | Middleweight | Brendan Allen def. Tom Breese | TKO (elbows and punches) | 1 | 4:47 |
| 2019-10-18 | UFC on ESPN: Reyes vs. Weidman | Middleweight | Brendan Allen def. Kevin Holland | Submission (rear-naked choke) | 2 | 3:38 |