| Sieg | 30-16 (1) | Niko Price  | TKO (Punches) |  | UFC 290: Volkanovski vs Rodriguez | Jul 08, 2023 | 1 | 0:38 | Las Vegas, Nevada, United States |
| Niederlage | 29-16 (1) | Bryan Barberena | TKO (Punches) |  | UFC 276: Adesanya vs Cannonier | Jul 02, 2022 | 2 | 4:47 | Las Vegas, Nevada, United States |
| Sieg | 29-15 (1) | Nick Diaz | TKO (Retirement) |  | UFC 266: Volkanovski vs Ortega | Sep 25, 2021 | 3 | 0:44 | Las Vegas, Nevada, United States |
| Cancelled Bout | | Mike Perry | - |  | UFC 255: Figueiredo vs Perez | Nov 21, 2020 | - | - | Las Vegas, Nevada, United States |
| Niederlage | 28-15 (1) | Neil Magny | Decision (Unanimous) |  | UFC Fight Night 175: Smith vs Rakic | Aug 29, 2020 | 3 | 5:00 | Las Vegas, Nevada, United States |
| Niederlage | 28-14 (1) | Colby Covington | Decision (Unanimous) |  | UFC on ESPN 5: Covington vs Lawler | Aug 03, 2019 | 5 | 5:00 | Newark, New Jersey, United States |
| Niederlage | 28-13 (1) | Ben Askren | Technical Submission (Bulldog Choke) | | UFC 235 | Mar 02, 2019 | 1 | 3:20 | Las Vegas, Nevada, United States |
| Niederlage | 28-12 (1) | Rafael dos Anjos  | Decision (unanimous |  | UFC on FOX 26: Lawler vs Dos Anjos | Dec 16, 2017 | 5 | 5:00 | Winnipeg, Manitoba, Canada |
| Sieg | 28-11 (1) | Donald Cerrone | Decision (Unanimous) |  | UFC 214: Cormier vs Jones 2 | Jul 29, 2017 | 3 | 5:00 | Anaheim, California, United States |
| Niederlage | 27-11 (1) | Tyron Woodley | KO (Punches) | | UFC 201: Lawler vs Woodley | Jul 30, 2016 | 1 | 2:12 | Atlanta, Georgia, United States |
| Sieg | 27-10 (1) | Carlos Condit | Decision (split) |  | UFC 195: Lawler vs Condit | Jan 02, 2016 | 5 | 5:00 | Las Vegas, United States |
| Sieg | 26-10 (1) | Rory MacDonald  | TKO (Punches) |  | UFC 189: Mendes vs McGregor | Jul 11, 2015 | 5 | 1:00 | Las Vegas, United States |
| Sieg | 25-10 (1) | Johny Hendricks | Decision (split) |  | UFC 181: Hendricks vs Lawler 2 | Dec 06, 2014 | 5 | 5:00 | Las Vegas, United States |
| Sieg | 24-10 (1) | Matt Brown | Decision (Unanimous) |  | UFC on Fox 12: Lawler vs Brown | Dec 06, 2014 | 5 | 5:00 | San Jose, California, United States |
| Sieg | 23-10 (1) | Jake Ellenberger | TKO (knee and punches) |  | UFC 173 | May 24, 2014 | 3 | 3:06 | Las Vegas, Nevada, United States |
| Niederlage | 22-10 (1) | Johny Hendricks | Decision (unanimous) |  | UFC 171 | Mar 15, 2014 | 5 | 5:00 | Dallas, Texas, United States |
| Sieg | 22-9 (1) | Rory MacDonald | Decision (split) |  | UFC 167 | Nov 16, 2013 | 3 | 5:00 | Las Vegas, Nevada, US |
| Sieg | 21-9 (1) | Bobby Voelker | KO (head kick and punches) | | UFC on Fox: Johnson vs. Moraga | Jul 27, 2013 | 2 | 0:24 | Seattle, Washington, United States |
| Sieg | 20-9 (1) | Josh Koscheck | TKO (punches) | | UFC 157 | Feb 23, 2013 | 1 | 3:57 | Anaheim, California, US |
| Niederlage | 19-9 (1) | Lorenz Larkin | Decision (unanimous) | | Strikeforce: Rockhold vs. Kennedy | Jul 14, 2012 | 3 | 5:00 | Portland, Oregon, US |
| Sieg | 19-8 (1) | Adlan Amagov  | TKO (flying knee and punches) |  | Strikeforce: Rockhold vs. Jardine | Jan 07, 2012 | 1 | 1:48 | Las Vegas, Nevada, United States |
| Niederlage | 18-8 (1) | Tim Kennedy | Decision (unanimous) |  | Strikeforce: Fedor vs. Henderson | Jul 30, 2011 | 3 | 5:00 | Hoffman Estates, United States |
| Niederlage | 18-7 (1) | Ronaldo Souza | Submission (rear naked choke) |  | Strikeforce: Diaz vs. Cyborg | Jan 29, 2011 | 3 | 2:00 | San Jose, United States |
| Sieg | 18-6 (1) | Matt Lindland | KO (punches) |  | Strikeforce: St. Louis | Dec 04, 2010 | 1 | 0:50 | St Louis, Missouri, United States |
| Niederlage | 17-6 (1) | Renato Sobral | Decision (unanimous) |  | Strikeforce: Los Angeles | Jun 16, 2010 | 3 | 5:00 | Los Angeles, California, U.S. |
| Sieg | 17-5 (1) | Melvin Manhoef  | KO (punch) |  | Strikeforce: Miami | Jan 30, 2010 | 1 | 3:33 | Sunrise, Florida, United States |
| Niederlage | 16-5 (1) | Jake Shields | Submission (guillotine choke) | | Strikeforce: Lawler vs. Shields | Jun 06, 2009 | 1 | 2:02 | St. Louis, Missouri, United States |
| Sieg | 16-4 (1) | Scott Smith | TKO (soccer kicks and punches) | | EliteXC: Unfinished Business | Jul 26, 2008 | 2 | 2:35 | Stockton, California, United States |
| NC | 15-4 (1) | Scott Smith | NC (thumb in the eye) | | EliteXC: Primetime | May 31, 2008 | 3 | 3:26 | Newark, New Jersey, United States |
| Sieg | 15-4 | Murilo Rua | KO (punches) | | EliteXC: Uprising | Sep 15, 2007 | 3 | 2:04 | Hawaii, United States |
| Sieg | 14-4 | Frank Trigg | KO (punches) | | ICON Sport: Epic | Mar 31, 2007 | 4 | 1:40 | Honolulu, Hawaii, United States |
| Sieg | 13-4 | Eduardo Pamplona | KO (punches) | | IFL: Atlanta | Feb 23, 2007 | 3 | 1:36 | Atlanta, Georgia, United States |
| Sieg | 12-4 | Joey Villasenor | KO (flying knee) | | PRIDE 32 | Oct 21, 2006 | 1 | 0:22 | Las Vegas, Nevada, United States |
| Niederlage | 11-4 | Jason Miller | Submission (arm-triangle choke) | | ICON Sport: Mayhem vs. Lawler | Sep 02, 2006 | 3 | 2:50 | Honolulu, Hawaii, United States |
| Sieg | 11-3 | Falaniko Vitale | KO (punches) | | ICON Sport: Lawler vs. Niko II | Feb 25, 2006 | 1 | 3:38 | Honolulu, Hawaii, United States |
| Sieg | 10-3 | Jeremy Brown | Submission (armbar) | | KOTC: Xtreme Edge | Sep 17, 2005 | 1 | 2:48 | Indianapolis, Indiana, United States |
| Sieg | 9-3 | Falaniko Vitale | KO (punches) | | SuperBrawl: Icon | Jul 23, 2005 | 2 | 4:36 | Honolulu, Hawaii, United States |
| Niederlage | 8-3 | Evan Tanner | Submission (triangle choke) | | UFC 50 | Oct 22, 2004 | 1 | 2:22 | Atlantic City, New Jersey, United States |
| Niederlage | 8-2 | Nick Diaz | KO (punch) | | UFC 47 | Apr 02, 2004 | 2 | 1:31 | Las Vegas, Nevada, United States |
| Sieg | 8-1 | Chris Lytle | Decision (unanimous) | | UFC 45 | Nov 21, 2003 | 3 | 5:00 | Uncasville, Connecticut, United States |
| Niederlage | 7-1 | Pete Spratt | Submission (hip injury) | | UFC 42 | Apr 25, 2003 | 2 | 2:28 | Miami, Florida, United States |
| Sieg | 7-0 | Tiki Ghosn | KO (punches) | | UFC 40 | Nov 22, 2002 | 1 | 1:29 | Las Vegas, Nevada, United States |
| Sieg | 6-0 | Steve Berger | TKO (punches) | | UFC 37.5 | Jun 22, 2002 | 2 | 0:27 | Las Vegas, Nevada, United States |
| Sieg | 5-0 | Aaron Riley | Decision (unanimous) | | UFC 37 | May 10, 2002 | 3 | 5:00 | Bossier City, Louisiana, United States |
| Sieg | 4-0 | Saburo Kawakatsu | TKO (punches) | | Shogun 1 | Dec 15, 2001 | 1 | 4:49 | Honolulu, Hawaii, United States |
| Sieg | 3-0 | Marco Macera | TKO (punches) | | Extreme Challenge 41 | Jul 13, 2001 | 1 | 1:19 | Davenport, Iowa, United States |
| Sieg | 2-0 | Landon Showalter | KO (punches) | | IFC: Warriors Challenge 13 | Jun 15, 2001 | 1 | 0:14 | Fresno, California, United States |
| Sieg | 1-0 | John Reed | TKO (punches) | | Extreme Challenge 39 | Apr 07, 2001 | 1 | 2:14 | Springfield, Illinois, United States |
