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Brian Martin Ortega (born February 21, 1991) is an American professional mixed martial artist who currently competes in the Featherweight division of the Ultimate Fighting Championship (UFC). A professional since 2010, Ortega has also competed in the RFA, where he was the Featherweight Champion. As of November 4, 2025, he is #9 in the UFC featherweight rankings.
| 22 matches | 16 wins | 5 losses |
| By knockout | 3 | 2 |
| By submission | 8 | 0 |
| By decision | 5 | 3 |
| No contests | 1 | |
| Res. | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
| Loss | 16–5 (1) | Aljamain Sterling | Decision (unanimous) | UFC Fight Night: Walker vs. Zhang | August 23, 2025 | 5 | 5:00 | Shanghai, China | Catchweight (153 lb) bout. |
| Loss | 16–4 (1) | Diego Lopes | Decision (unanimous) | UFC 306 | September 14, 2024 | 3 | 5:00 | Las Vegas, Nevada, United States | |
| Win | 16–3 (1) | Yair Rodríguez | Submission (arm-triangle choke) | UFC Fight Night: Moreno vs. Royval 2 | February 24, 2024 | 3 | 0:58 | Mexico City, Mexico | Performance of the Night. |
| Loss | 15–3 (1) | Yair Rodríguez | TKO (shoulder injury) | UFC on ABC: Ortega vs. Rodríguez | July 16, 2022 | 1 | 4:11 | Elmont, New York, United States | |
| Loss | 15–2 (1) | Alexander Volkanovski | Decision (unanimous) | UFC 266 | September 25, 2021 | 5 | 5:00 | Las Vegas, Nevada, United States | For the UFC Featherweight Championship. Fight of the Night. |
| Win | 15–1 (1) | Jung Chan-sung | Decision (unanimous) | UFC Fight Night: Ortega vs. The Korean Zombie | October 18, 2020 | 5 | 5:00 | Abu Dhabi, United Arab Emirates | |
| Loss | 14–1 (1) | Max Holloway | TKO (doctor stoppage) | UFC 231 | December 8, 2018 | 4 | 5:00 | Toronto, Ontario, Canada | For the UFC Featherweight Championship. Fight of the Night. |
| Win | 14–0 (1) | Frankie Edgar | KO (punch) | UFC 222 | March 3, 2018 | 1 | 4:44 | Las Vegas, Nevada, United States | Performance of the Night. |
| Win | 13–0 (1) | Cub Swanson | Submission (guillotine choke) | UFC Fight Night: Swanson vs. Ortega | December 9, 2017 | 2 | 3:22 | Fresno, California, United States | Performance of the Night. Fight of the Night. |
| Win | 12–0 (1) | Renato Moicano | Submission (guillotine choke) | UFC 214 | July 29, 2017 | 3 | 2:59 | Anaheim, California, United States | Fight of the Night. |
| Win | 11–0 (1) | Clay Guida | KO (knee) | UFC 199 | June 4, 2016 | 3 | 4:40 | Inglewood, California, United States | |
| Win | 10–0 (1) | Diego Brandão | Submission (triangle choke) | UFC 195 | January 2, 2016 | 3 | 1:37 | Las Vegas, Nevada, United States | |
| Win | 9–0 (1) | Thiago Tavares | TKO (punches) | UFC Fight Night: Boetsch vs. Henderson | June 6, 2015 | 3 | 4:10 | New Orleans, Louisiana, United States | Fight of the Night. |
| NC | 8–0 (1) | Mike De La Torre | NC (overturned) | UFC on Fox: Lawler vs. Brown | July 26, 2014 | 1 | 1:39 | San Jose, California, United States | Originally a submission (rear-naked choke) win for Ortega; overturned after he tested positive for drostanolone. |
| Win | 8–0 | Keoni Koch | Decision (split) | RFA 12 | January 24, 2014 | 5 | 5:00 | Los Angeles, California, United States | Won the RFA Featherweight Championship. |
| Win | 7–0 | Jordan Rinaldi | Submission (triangle choke) | RFA 9 | August 6, 2013 | 3 | 2:29 | Pomona, California, United States | |
| Win | 6–0 | Thomas Guimond | Submission (triangle choke) | Respect in the Cage 20 | May 4, 2013 | 1 | 4:02 | Pomona, California, United States | Defended the RTC Featherweight Championship. |
| Win | 5–0 | Carlos Garces | Decision (unanimous) | Respect in the Cage 10 | March 12, 2011 | 5 | 5:00 | Pomona, California, United States | Won the RTC Featherweight Championship. |
| Win | 4–0 | Chris Mercado | Decision (unanimous) | Respect in the Cage 9 | January 15, 2011 | 3 | 5:00 | Pomona, California, United States | |
| Win | 3–0 | Vincent Martinez | Submission (rear-naked choke) | Respect in the Cage 5 | July 24, 2010 | 1 | 1:54 | Los Angeles, California, United States | |
| Win | 2–0 | Brady Harrison | Decision (unanimous) | Gladiator Challenge: Bad Behaviour | June 27, 2010 | 3 | 5:00 | San Jacinto, California, United States | |
| Win | 1–0 | John Sassone | Submission (triangle choke) | Gladiator Challenge: Maximum Force | April 25, 2010 | 1 | 1:48 | San Jacinto, California, United States |
| No. | Event | Fight | Date | Venue | City | PPV Buys |
| 1. | UFC 231 | Holloway vs. Ortega | December 8, 2018 | Scotiabank Arena | Toronto, Ontario, Canada | 300,000 |
| 2. | UFC 266 | Volkanovski vs. Ortega | September 25, 2021 | T-Mobile Arena | Las Vegas, Nevada, United States | Not Disclosed |