| Niederlage | 20-9 | Gadzhi Rabadanov  | TKO (Punches) |  | PFL World Tournament 6: 2025 Semifinals | Jun 20, 2025 | 1 | 2:37 | Wichita, Kansas, United States  |
| Cancelled Bout | | Saul Almeida  | - |  | Gamebred Bareknuckle MMA: Costa vs Davis | Nov 15, 2024 | - | - | Biloxi, Mississippi, United States |
| Sieg | 20-8 | Thiago Oliveira | Submission (Rear-Naked Choke) |  | Lights Out Championship 17 | Sep 28, 2024 | 1 | 1:58 | Wayne, Michigan, United States |
| Niederlage | 19-8 | Rinat Fakhretdinov | Technical Submission (Guillotine Choke) |  | UFC Fight Night: Strickland vs Magomedov | Jul 01, 2023 | 1 | 0:55 | Las Vegas, Nevada, United States |
| Sieg | 19-7 | Diego Sanchez | Decision (Unanimous) |  | Eagle FC 46: Lee vs Sanchez | Mar 11, 2022 | 3 | 5:00 | Miami, Florida, USA |
| Niederlage | 18-7 | Daniel Rodriguez | Decision (Unanimous) |  | UFC Fight Night: Barboza vs Chikadze | Aug 28, 2021 | 3 | 5:00 | Las Vegas, Nevada, United States |
| Cancelled Bout | | Sean Brady | - |  | UFC 264: Poirier vs McGregor 3 | Jul 10, 2021 | - | - | Las Vegas, Nevada, United States |
| Niederlage | 18-6 | Charles Oliveira | Submission (Guillotine Choke) |  | UFC on ESPN+ 28: Lee vs Oliveira | Mar 14, 2020 | 3 | 0:28 | Brasilia, Federal District, Brazil |
| Sieg | 18-5 | Gregor Gillespie | KO (Head Kick) |  | UFC 244: Masvidal vs Diaz | Nov 02, 2019 | 1 | 2:47 | New York City, New York, United States |
| Niederlage | 17-5 | Rafael dos Anjos | Submission (Arm-Triangle Choke) |  | UFC on ESPN+ 9: Dos Anjos vs Lee | May 18, 2019 | 4 | 3:47 | Rochester, New York, United States |
| Niederlage | 17-4 | Al Iaquinta | Decision (Unanimous) |  | UFC on FOX 31: Lee vs Iaquinta 2 | Dec 15, 2018 | 5 | 5:00 | Milwaukee, Wisconsin, United States |
| Sieg | 17-3 | Edson Barboza | TKO (doctor stoppage) |  | UFC Fight Night 128: Barboza vs Lee | Apr 21, 2018 | 5 | 2:18 | Atlantic City, New Jersey, United States |
| Niederlage | 16-3 | Tony Ferguson | Submission (triangle choke) | | UFC 216: Ferguson vs Lee | Oct 07, 2017 | 3 | 4:02 | Las Vegas, Nevada, United States |
| Sieg | 16-2 | Michael Chiesa | Technical Submission (rear-naked choke) |  | UFC Fight Night: Chiesa vs. Lee | Jun 25, 2017 | 1 | 4:37 | Oklahoma City, Oklahoma, United States |
| Sieg | 15-2 | Francisco Trinaldo | Submission (rear-naked choke) | | UFC Fight Night: Belfort vs. Gastelum | Mar 11, 2017 | 2 | 3:12 | Fortaleza, Brazil |
| Sieg | 14-2 | Magomed Mustafaev | Technical Submission (rear-naked choke) |  | UFC Fight Night 99: Mousasi vs Hall 2 | Nov 19, 2016 | 2 | 4:31 | Belfast, Northern Ireland |
| Sieg | 13-2 | Jake Matthews  | TKO (punches) | | The Ultimate Fighter 23 Finale | Jul 08, 2016 | 1 | 4:06 | Las Vegas, United States |
| Sieg | 12-2 | Efrain Escudero  | Decision (unanimous) | | UFC 197 | Apr 23, 2016 | 3 | 5:00 | Nevada, United States |
| Niederlage | 11-2 | Leonardo Santos | TKO (punches) | | UFC 194 | Dec 12, 2015 | 1 | 3:26 | Nevada, United States |
| Sieg | 11-1 | James Moontasri | Submission (rear-naked choke) | | UFC Fight Night: Mir vs. Duffee | Jul 15, 2015 | 1 | 2:56 | California, United States |
| Sieg | 10-1 | Michel Prazeres | Decision (unanimous) | | UFC Fight Night: Henderson vs. Thatch | Feb 14, 2015 | 3 | 5:00 | Colorado, United States |
| Sieg | 9-1 | Jon Tuck  | Decision (unanimous) | | UFC 178 | Sep 27, 2014 | 3 | 5:00 | Nevada, United States |
| Sieg | 8-1 | Jesse Ronson  | Decision (split) | | The Ultimate Fighter: Team Edgar vs. Team Penn Finale | Jul 06, 2014 | 3 | 5:00 | Nevada, United States |
| Niederlage | 7-1 | Al Iaquinta | Decision (unanimous) |  | UFC 169 | Feb 01, 2014 | 3 | 5:00 | New Jersey, United States |
| Sieg | 7-0 | Eric Moon | Submission (standing guillotine choke) | | TWC 20: Final Cut | Nov 16, 2013 | 1 | 1:24 | Michigan, United States |
| Sieg | 6-0 | Travis Gervais | Submission (armbar) | | Canadian Fighting Championship 8 | Sep 13, 2013 | 1 | 0:46 | Manitoba, Canada |
| Sieg | 5-0 | Joseph Lile | Submission (rear-naked choke) | | Midwest Fight Series 5 | Jul 19, 2013 | 3 | 1:29 | Indiana, United States |
| Sieg | 4-0 | Kyle Prepolec | Submission (guillotine choke) | | Michiana Fight League | Apr 13, 2013 | 2 | 2:17 | Indiana, United States |
| Sieg | 3-0 | J.P. Reese | Decision (unanimous) | | IFL 51: No Guts, No Glory | Nov 17, 2012 | 3 | 5:00 | Michigan, United States |
| Sieg | 2-0 | Mansour Barnaoui  | Decision (Unanimous) |  | Instinct MMA - Instinct Fighting 4 | Jun 29, 2012 | 3 | 5:00 | Quebec, Canada |
| Sieg | 1-0 | Levis Labrie | Decision (unanimous) | | Instinct MMA: Instinct Fighting 3 | Mar 31, 2012 | 3 | 5:00 | Quebec, Canada |
