| Niederlage | 16-4 (1) | Diego Lopes  | Decision (Unanimous) |  | UFC 306: O'Malley vs Dvalishvili | Sep 14, 2024 | 3 | 5:00 | Las Vegas, Nevada, United States  |
| Cancelled Bout | | Diego Lopes | - |  | UFC 303: Pereira vs Procházka 2 | Jun 29, 2024 | - | - | Las Vegas, Nevada, United States |
| Sieg | 16-3 (1) | Yair Rodriguez  | Submission (Arm-Triangle Choke) |  | UFC Fight Night: Moreno vs Royval 2 | Feb 24, 2024 | 3 | 0:58 | Mexico City, Mexico |
| Niederlage | 15-3 (1) | Yair Rodriguez | TKO (Shoulder Injury) |  | UFC Fight Night: Ortega vs Rodriguez | Jul 16, 2022 | 1 | 4:11 | Long Island, New York, United States |
| Niederlage | 15-2 (1) | Alexander Volkanovski  | Decision (Unanimous) |  | UFC 266: Volkanovski vs Ortega | Sep 25, 2021 | 5 | 5:00 | Las Vegas, Nevada, United States |
| Cancelled Bout | | Alexander Volkanovski | - |  | UFC 260: Miocic vs Ngannou 2 | Mar 27, 2021 | - | - | Las Vegas, Nevada, United States |
| Sieg | 15-1 (1) | Chan Sung Jung  | Decision (Unanimous) |  | UFC Fight Night 180: Ortega vs Korean Zombie | Oct 17, 2020 | 5 | 5:00 | Abu Dhabi, Dubai, United Arab Emirates  |
| Cancelled Bout | | Zabit Magomedsharipov  | - |  | UFC 249 | Apr 18, 2020 | - | - | Brooklyn, New York, United States |
| Cancelled Bout | | Zabit Magomedsharipov | - |  | UFC 240: Holloway vs Edgar | Jul 27, 2019 | - | - | Edmonton, Alberta, Canada |
| Niederlage | 14-1 (1) | Max Holloway | TKO (Doctor Stoppage) |  | UFC 231: Holloway vs Ortega | Dec 08, 2018 | 4 | 5:00 | Toronto, Ontario, Canada |
| Sieg | 14-0 (1) | Frankie Edgar | KO (punch) |  | UFC 222 | Mar 03, 2018 | 1 | 4:44 | Las Vegas, Nevada, United States |
| Sieg | 13-0 (1) | Cub Swanson | Submission (Guillotine Choke) |  | UFC Fight Night 123: Swanson vs Ortega | Dec 09, 2017 | 2 | 3:22 | Fresno, California, United States |
| Sieg | 12-0 (1) | Renato Carneiro | Submission (Guillotine Choke) |  | UFC 214: Cormier vs Jones 2 | Jul 29, 2017 | 3 | 2:59 | Anaheim, California, United States |
| Sieg | 11-0 (1) | Clay Guida | TKO (knee) |  | UFC 199: Rockhold vs Bisping 2 | Jun 04, 2016 | 3 | 4:40 | Inglewood, United States |
| Sieg | 10-0 (1) | Diego Brandão | Submission (triangle choke) |  | UFC 195 | Jan 02, 2016 | 3 | 1:37 | Nevada, United States |
| Sieg | 9-0 (1) | Thiago Tavares | TKO (punches) |  | UFC Fight Night: Boetsch vs. Henderson | Jun 06, 2015 | 3 | 4:10 | Louisiana, United States |
| NC | 8-0 (1) | Mike De La Torre | NC (overturned) |  | UFC on Fox: Lawler vs. Brown | Jul 26, 2014 | 1 | 1:39 | California, United States |
| Sieg | 8-0 | Keoni Koch | Decision (split) | | RFA 12 | Jan 24, 2014 | 5 | 5:00 | California, United States |
| Sieg | 7-0 | Jordan Rin | Submission (triangle choke) | | RFA 9 | Aug 06, 2013 | 3 | 2:29 | California, United States |
| Sieg | 6-0 | Thomas Guimond | Submission (triangle choke) | | Respect In The Cage 20 | May 04, 2013 | 1 | 4:02 | California, United States |
| Sieg | 5-0 | Carlos Garces | Decision (unanimous) | | Respect In The Cage 10 | Mar 12, 2011 | 5 | 5:00 | California, United States |
| Sieg | 4-0 | Chris Mercado | Decision (unanimous) | | Respect In The Cage 9 | Jan 15, 2011 | 3 | 5:00 | California, United States |
| Sieg | 3-0 | Vincent Martinez | Submission (rear-naked choke) | | Respect In The Cage 5 | Jul 24, 2010 | 1 | 1:54 | California, United States |
| Sieg | 2-0 | Amir Fattakhov | Decision (unanimous) | | Gladiator Challenge: Bad Behaviour | Jun 27, 2010 | 3 | 5:00 | California, United States |
| Sieg | 1-0 | John Sassone | Submission (triangle choke) | | Gladiator Challenge: Maximum Force | Apr 25, 2010 | 1 | 1:48 | California, United States |
