| 2023-11-04 | UFC Fight Night: Almeida vs. Lewis | Lightweight | Marc Diakiese def. Kauê Fernandes | Decision (split) (29–28, 28–29, 30–27) | 3 | 5:00 |
| 2023-07-22 | UFC Fight Night: Aspinall vs. Tybura | Lightweight | Joel Álvarez def. Marc Diakiese | Submission (brabo choke) | 2 | 4:26 |
| 2022-12-03 | UFC on ESPN: Thompson vs. Holland | Lightweight | Michael Johnson def. Marc Diakiese | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2022-07-23 | UFC Fight Night: Blaydes vs. Aspinall | Lightweight | Marc Diakiese def. Damir Hadžović | Decision (unanimous) (30–26, 30–26, 30–27) | 3 | 5:00 |
| 2022-03-26 | UFC on ESPN: Blaydes vs. Daukaus | Lightweight | Marc Diakiese def. Viacheslav Borshchev | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2021-11-13 | UFC Fight Night: Holloway vs. Rodríguez | Lightweight | Rafael Alves def. Marc Diakiese | Submission (guillotine choke) | 1 | 1:48 |
| 2020-07-19 | UFC Fight Night: Figueiredo vs. Benavidez 2 | Lightweight | Rafael Fiziev def. Marc Diakiese | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier | Lightweight | Marc Diakiese def. Lando Vannata | Decision (unanimous) (30–27, 30–27, 30–26) | 3 | 5:00 |
| 2019-03-16 | UFC Fight Night: Till vs. Masvidal | Lightweight | Marc Diakiese def. Joseph Duffy | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2018-07-22 | UFC Fight Night: Shogun vs. Smith | Lightweight | Nasrat Haqparast def. Marc Diakiese | Decision (unanimous) (30–27, 30–27, 30–26) | 3 | 5:00 |
| 2017-12-30 | UFC 219: Cyborg vs. Holm | Lightweight | Dan Hooker def. Marc Diakiese | Submission (guillotine choke) | 3 | 0:42 |
| 2017-07-07 | The Ultimate Fighter: Redemption Finale | Lightweight | Drakkar Klose def. Marc Diakiese | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2017-03-18 | UFC Fight Night: Manuwa vs. Anderson | Lightweight | Marc Diakiese def. Teemu Packalén | KO (punch) | 1 | 0:30 |
| 2016-12-09 | UFC Fight Night: Lewis vs. Abdurakhimov | Lightweight | Marc Diakiese def. Frankie Perez | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2016-10-08 | UFC 204: Bisping vs. Henderson 2 | Lightweight | Marc Diakiese def. Łukasz Sajewski | TKO (knees and punches) | 2 | 4:40 |