| 2025-10-04 | UFC 320: Ankalaev vs. Pereira 2 | Light Heavyweight | Jiří Procházka def. Khalil Rountree Jr. | KO (punches) | 3 | 3:04 |
| 2025-06-21 | UFC on ABC: Hill vs. Rountree Jr. | Light Heavyweight | Khalil Rountree Jr. def. Jamahal Hill | Decision (unanimous) (49–46, 50–45, 50–45) | 5 | 5:00 |
| 2024-10-05 | UFC 307: Pereira vs. Rountree Jr. | Light Heavyweight | Alex Pereira def. Khalil Rountree Jr. title | TKO (punches) | 4 | 4:32 |
| 2023-12-09 | UFC Fight Night: Song vs. Gutiérrez | Light Heavyweight | Khalil Rountree Jr. def. Anthony Smith | TKO (punches) | 3 | 0:56 |
| 2023-08-12 | UFC on ESPN: Luque vs. dos Anjos | Light Heavyweight | Khalil Rountree Jr. def. Chris Daukaus | TKO (punches) | 1 | 2:40 |
| 2022-10-29 | UFC Fight Night: Kattar vs. Allen | Light Heavyweight | Khalil Rountree Jr. def. Dustin Jacoby | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2022-03-12 | UFC Fight Night: Santos vs. Ankalaev | Light Heavyweight | Khalil Rountree Jr. def. Karl Roberson | TKO (body kick and punches) | 2 | 0:25 |
| 2021-09-04 | UFC Fight Night: Brunson vs. Till | Light Heavyweight | Khalil Rountree Jr. def. Modestas Bukauskas | TKO (leg kick) | 2 | 2:30 |
| 2021-01-24 | UFC 257: Poirier vs. McGregor 2 | Light Heavyweight | Marcin Prachnio def. Khalil Rountree Jr. | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier | Light Heavyweight | Ion Cuțelaba def. Khalil Rountree Jr. | TKO (elbows) | 1 | 2:35 |
| 2019-04-13 | UFC 236: Holloway vs. Poirier 2 | Light Heavyweight | Khalil Rountree Jr. def. Eryk Anders | Decision (unanimous) (30–26, 30–26, 30–26) | 3 | 5:00 |
| 2018-11-17 | UFC Fight Night: Magny vs. Ponzinibbio | Light Heavyweight | Johnny Walker def. Khalil Rountree Jr. | KO (elbow) | 1 | 1:57 |
| 2018-07-07 | UFC 226: Miocic vs. Cormier | Light Heavyweight | Khalil Rountree Jr. def. Gökhan Saki | KO (punches) | 1 | 1:36 |
| 2017-12-30 | UFC 219: Cyborg vs. Holm | Light Heavyweight | Michał Oleksiejczuk vs. Khalil Rountree Jr. | No Contest (overturned) | 3 | 5:00 |
| 2017-07-16 | UFC Fight Night: Nelson vs. Ponzinibbio | Light Heavyweight | Khalil Rountree Jr. def. Paul Craig | KO (punches) | 1 | 4:56 |
| 2017-02-04 | UFC Fight Night: Bermudez vs. The Korean Zombie | Light Heavyweight | Khalil Rountree Jr. def. Daniel Jolly | KO (knee) | 1 | 0:52 |
| 2016-11-27 | UFC Fight Night: Whittaker vs. Brunson | Light Heavyweight | Tyson Pedro def. Khalil Rountree Jr. | Submission (rear-naked choke) | 1 | 4:07 |
| 2016-07-08 | The Ultimate Fighter: Team Joanna vs. Team Cláudia Finale | Light Heavyweight | Andrew Sanchez def. Khalil Rountree Jr. | Decision (unanimous) (30–25, 30–25, 30–26) | 3 | 5:00 |