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Joaquin Yuconri Buckley ( whah-KEEN; born April 27, 1994) is an American professional mixed martial artist. He currently competes in the welterweight division of the Ultimate Fighting Championship (UFC). A professional since 2014, he has also formerly competed for Bellator MMA and Legacy Fighting Alliance. As of November 18, 2025, he is #10 in the UFC welterweight rankings.
| 28 matches | 21 wins | 7 losses |
| By knockout | 15 | 4 |
| By decision | 6 | 3 |
| Res. | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
| Loss | 21–7 | Kamaru Usman | Decision (unanimous) | UFC on ESPN: Usman vs. Buckley | June 14, 2025 | 5 | 5:00 | Atlanta, Georgia, United States | Fight of the Night. |
| Win | 21–6 | Colby Covington | TKO (doctor stoppage) | UFC on ESPN: Covington vs. Buckley | December 14, 2024 | 3 | 4:42 | Tampa, Florida, United States | |
| Win | 20–6 | Stephen Thompson | KO (punch) | UFC 307 | October 5, 2024 | 3 | 2:17 | Salt Lake City, Utah, United States | Performance of the Night. |
| Win | 19–6 | Nursulton Ruziboev | Decision (unanimous) | UFC on ESPN: Lewis vs. Nascimento | May 11, 2024 | 3 | 5:00 | St. Louis, Missouri, United States | |
| Win | 18–6 | Vicente Luque | TKO (punches) | UFC on ESPN: Blanchfield vs. Fiorot | March 30, 2024 | 2 | 3:17 | Atlantic City, New Jersey, United States | |
| Win | 17–6 | Alex Morono | Decision (unanimous) | UFC Fight Night: Dawson vs. Green | October 7, 2023 | 3 | 5:00 | Las Vegas, Nevada, United States | |
| Win | 16–6 | André Fialho | TKO (head kick) | UFC Fight Night: Dern vs. Hill | May 20, 2023 | 2 | 4:15 | Las Vegas, Nevada, United States | Return to Welterweight. |
| Loss | 15–6 | Chris Curtis | KO (punches) | UFC 282 | December 10, 2022 | 2 | 2:49 | Las Vegas, Nevada, United States | |
| Loss | 15–5 | Nassourdine Imavov | Decision (unanimous) | UFC Fight Night: Gane vs. Tuivasa | September 3, 2022 | 3 | 5:00 | Paris, France | |
| Win | 15–4 | Albert Duraev | TKO (doctor stoppage) | UFC on ESPN: Kattar vs. Emmett | June 18, 2022 | 2 | 5:00 | Austin, Texas, United States | Performance of the Night. |
| Win | 14–4 | Abdul Razak Alhassan | Decision (split) | UFC Fight Night: Walker vs. Hill | February 19, 2022 | 3 | 5:00 | Las Vegas, Nevada, United States | |
| Win | 13–4 | Antônio Arroyo | KO (punches) | UFC Fight Night: Smith vs. Spann | September 18, 2021 | 3 | 2:26 | Las Vegas, Nevada, United States | Performance of the Night. |
| Loss | 12–4 | Alessio Di Chirico | KO (head kick) | UFC on ABC: Holloway vs. Kattar | January 16, 2021 | 1 | 2:12 | Abu Dhabi, United Arab Emirates | |
| Win | 12–3 | Jordan Wright | KO (punches) | UFC 255 | November 21, 2020 | 2 | 0:18 | Las Vegas, Nevada, United States | Performance of the Night. |
| Win | 11–3 | Impa Kasanganay | KO (spinning back kick) | UFC Fight Night: Moraes vs. Sandhagen | October 11, 2020 | 2 | 2:03 | Abu Dhabi, United Arab Emirates | Performance of the Night. |
| Loss | 10–3 | Kevin Holland | TKO (punch) | UFC Fight Night: Lewis vs. Oleinik | August 8, 2020 | 3 | 0:32 | Las Vegas, Nevada, United States | |
| Win | 10–2 | Jackie Gosh | TKO (punches) | LFA 87 | July 31, 2020 | 2 | 1:47 | Sioux Falls, South Dakota, United States | |
| Win | 9–2 | Chris Harris | TKO (punches) | LFA 76 | September 13, 2019 | 1 | 1:08 | Park City, Kansas, United States | Middleweight debut. |
| Loss | 8–2 | Logan Storley | Decision (unanimous) | Bellator 197 | April 13, 2018 | 3 | 5:00 | St. Charles, Missouri, United States | |
| Win | 8–1 | Vinicius de Jesus | Decision (split) | Bellator 185 | October 20, 2017 | 3 | 5:00 | Uncasville, Connecticut, United States | |
| Win | 7–1 | Justin Patterson | Decision (unanimous) | Bellator 175 | March 31, 2017 | 3 | 5:00 | Rosemont, Illinois, United States | |
| Loss | 6–1 | Jackie Gosh | TKO (punches) | Bellator 164 | November 10, 2016 | 1 | 2:44 | Tel Aviv, Israel | |
| Win | 6–0 | Chris Heatherly | KO (knee) | Bellator 157: Dynamite 2 | June 24, 2016 | 2 | 4:14 | St. Louis, Missouri, United States | Catchweight (180 lb) bout. |
| Win | 5–0 | Kyle Kurtz | TKO (knee and punches) | Shamrock FC: Fuel | September 11, 2015 | 1 | 4:34 | St. Louis, Missouri, United States | |
| Win | 4–0 | Stacy Bacon | Decision (unanimous) | Shamrock FC: Throwdown | July 25, 2015 | 3 | 5:00 | St. Louis, Missouri, United States | |
| Win | 3–0 | Kalel Robinson | TKO (punches) | Shamrock FC: Showdown | March 21, 2015 | 3 | 4:01 | St. Louis, Missouri, United States | |
| Win | 2–0 | Bryant West | TKO (punches) | Shamrock FC: Xtreme Fight Night 2 | February 21, 2015 | 1 | 2:28 | St. Louis, Missouri, United States | |
| Win | 1–0 | Wesley Sullivan | TKO (punches) | Shamrock FC: Nemesis | September 13, 2014 | 1 | 3:46 | St. Louis, Missouri, United States |