| Cancelled Bout | | Alexander Gustafsson  | - |  | UFC Fight Night: Holm vs Vieira | May 21, 2022 | - | - | Las Vegas, Nevada, United States  |
| Niederlage | 39-14 | Marcos Rogerio de Lima  | TKO (Punches) |  | UFC Fight Night: Holloway vs Rodriguez | Nov 13, 2021 | 1 | 0:32 | Las Vegas, Nevada, United States |
| Sieg | 39-13 | Chris Barnett | Submission (Guillotine Choke) |  | UFC Fight Night: Font vs Garbrandt | May 22, 2021 | 2 | 2:07 | Uncasville, Connecticut, United States |
| Cancelled Bout | | Philipe Lins | - |  | UFC on ESPN 24: Rodriguez vs Waterson | May 08, 2021 | - | - | Las Vegas, Nevada, United States |
| Cancelled Bout | | Philipe Lins | - |  | UFC Fight Night 187: Edwards vs Muhammad | Mar 13, 2021 | - | - | Las Vegas, Nevada, United States |
| Niederlage | 38-13 | Marcin Tybura  | Decision (Unanimous) |  | UFC Fight Night 179: Moraes vs Sandhagen | Oct 10, 2020 | 3 | 5:00 | Abu Dhabi, Dubai, United Arab Emirates  |
| Sieg | 38-12 | Ovince Saint Preux | Decision (Split) |  | UFC Fight Night: Smith vs Teixeira | May 13, 2020 | 3 | 5:00 | Jacksonville, Florida, United States |
| Cancelled Bout | | Gian Villante | - |  | UFC 249 | Apr 18, 2020 | - | - | Brooklyn, New York, United States |
| Sieg | 37-12 | Stefan Struve  | TKO (Punches) |  | UFC on ESPN 7: Overeem vs Rozenstruik | Dec 07, 2019 | 2 | 4:57 | Washington D.C., United States |
| Niederlage | 36-12 | Andrey Arlovski  | Decision (Unanimous) |  | UFC on ESPN 4 | Jul 20, 2019 | 3 | 5:00 | San Antonio, Texas, United States |
| Niederlage | 36-11 | Blagoi Ivanov  | Decision (Unanimous) |  | UFC Fight Night: 146 Lewis vs Dos Santos | Mar 09, 2019 | 3 | 5:00 | Wichita, Kansas, United States |
| Niederlage | 36-10 | Junior dos Santos | Decision (Unanimous) |  | UFC Fight Night 86: Rothwell vs Dos Santos | Apr 10, 2016 | 5 | 5:00 | Zagreb, Croatia |
| Sieg | 36-9 | Josh Barnett | Submission (gogo choke) |  | UFC on FOX 18: Johnson vs Bader | Jan 30, 2016 | 2 | 3:48 | Newark, United States |
| Sieg | 35-9 | Matt Mitrione | Submission (Front Guillotine choke) |  | UFC Fight Night: Boetsch vs Henderson | Jun 06, 2015 | 1 | 1:54 | New Orleans, United States |
| Sieg | 34-9 | Alistair Overeem | TKO (punches) |  | UFC Fight Night: Mousasi vs Jacare | Sep 05, 2014 | 1 | 2:19 | Ledyard, United States |
| Sieg | 33-9 | Brandon Vera | TKO (punches) | | UFC 164 | Aug 31, 2013 | 3 | 1:54 | Milwaukee, United States |
| Niederlage | 32-9 | Gabriel Gonzaga | Submission (guillotine choke) |  | UFC: Belfort vs Bisping | Jan 19, 2013 | 2 | 1:01 | São Paulo, Brazil |
| Sieg | 32-8 | Brendan Schaub | KO (punches) |  | UFC 145: Jones vs Evans | Apr 21, 2012 | 1 | 1:10 | Atlanta, Georgia, United States |
| Niederlage | 31-8 | Mark Hunt  | Decision (unanimous) |  | UFC 135 | Sep 24, 2011 | 3 | 5:00 | Colorado, United States |
| Sieg | 31-7 | Gilbert Yvel | Decision (unanimous) |  | UFC 115 | Jun 12, 2010 | 3 | 5:00 | Vancouver, British Columbia, Canada  |
| Niederlage | 30-7 | Cain Velasquez | TKO (punches) |  | UFC 104 | Oct 24, 2009 | 2 | 0:58 | Los Angeles, United States |
| Sieg | 30-6 | Chris Guillen | Submission (elbows) | | Adrenaline MMA 2: Miletich vs. Denny | Dec 11, 2008 | 1 | 3:30 | Moline, Illinois, United States |
| Niederlage | 29-6 | Andrey Arlovski | KO (punches) | | Affliction: Banned | Jul 19, 2008 | 3 | 1:13 | Anaheim, United States |
| Sieg | 29-5 | Ricco Rodriguez | Decision (unanimous) | | IFL: 2007 Team Championship Final | Sep 20, 2007 | 3 | 4:00 | Hollywood,United States |
| Sieg | 28-5 | Krzysztof Soszynski | TKO (punches) | | IFL: 2007 Semifinals | Aug 02, 2007 | 1 | 0:13 | East Rutherford, United States |
| Sieg | 27-5 | Travis Fulton | Submission (kimura) | | IFL: Chicago | May 19, 2007 | 2 | 3:11 | Chicago, United States |
| Sieg | 26-5 | Roy Nelson | Decision (split) | | IFL: Moline | Apr 07, 2007 | 3 | 4:00 | Moline, Illinois, United States |
| Sieg | 25-5 | Matt Thompson | TKO (punches) | | IFL: Houston | Feb 02, 2007 | 2 | 1:47 | Houston, Texas, United States |
| Sieg | 24-5 | Devin Cole | KO (head kick) | | IFL: Championship Final | Dec 29, 2006 | 1 | 3:16 | Connecticut, United States |
| Sieg | 23-5 | Wojtek Kaszowski | Submission (keylock) | | IFL: World Championship Semifinals | Nov 02, 2006 | 1 | 3:14 | Portland, United States |
| Sieg | 22-5 | Bryan Vetell | KO (punch) | | IFL: Gracie vs. Miletich | Sep 23, 2006 | 1 | 3:17 | Moline, Illinois, United States |
| Sieg | 21-5 | Krzysztof Soszynski | TKO (punches) | | IFL: Legends Championship 2006 | Apr 29, 2006 | 1 | 3:59 | New Jersey, United States |
| Sieg | 20-5 | Dan Bobish | KO (knee) | | GFC | Mar 03, 2006 | 1 | 4:20 | Ohio, United States |
| Sieg | 19-5 | Joey Smith | Submission (punches) | | ISCF: Gladiators X | Feb 24, 2006 | 1 | N/A | Wisconsin, United States |
| Sieg | 18-5 | Don Richard | TKO (punches) | | KOTC: Conquest. King of the Cage Canada! | Dec 03, 2005 | 1 | 3:32 | Alberta, Canada |
| Sieg | 17-5 | Allan Weickert | TKO (punches) | | GFS: Fight Nite in the Flats | Sep 17, 2005 | 1 | 3:45 | Ohio, United States |
| Niederlage | 16-5 | Dan Christison | Submission (kimura) | | Euphoria: USA vs World | Feb 26, 2005 | 3 | 0:57 | New Jersey, United States |
| Sieg | 16-4 | Jonathan Wiezorek | TKO (punches) | | Euphoria: Road to the Titles | Oct 15, 2004 | 1 | 1:09 | New Jersey, United States |
| Sieg | 15-4 | Matt Bear | Submission (punches) | | Ultimate Throwdown | Jul 16, 2004 | 1 | 2:57 | Iowa, United States |
| Niederlage | 14-4 | Carlos Barreto | KO (head kick) | | Heat FC 1: Genesis | Jul 31, 2003 | 1 | N/A | Natal, Brazil |
| Sieg | 14-3 | Royce Louck | TKO (cut) | | Freestyle Combat Challenge 11 | Jun 28, 2003 | 1 | N/A | Wisconsin, United States |
| Niederlage | 13-3 | Ibragim Magomedov  | TKO (retirement) | | M-1 MFC: Russia vs the World 4 | Nov 15, 2002 | 1 | 10:00 | St. Petersburg, Russia |
| Sieg | 13-2 | Travis Fulton | Submission (injury) | | Freestyle Combat Challenge 8 | Oct 04, 2002 | 1 | 5:00 | Racine, United States |
| Sieg | 12-2 | Johnathan Ivey | TKO (cut) | | USMMA 2: Ring of Fury | Sep 21, 2002 | 1 | 1:14 | Massachusetts, United States |
| Niederlage | 11-2 | Mike Whitehead | Decision (unanimous) | | SB 24: Return of the Heavyweights 2 | Apr 27, 2002 | 2 | 5:00 | Hawaii, United States |
| Sieg | 11-1 | Kerry Schall | TKO (chair) | | SB 24: Return of the Heavyweights 2 | Apr 27, 2002 | 2 | 2:10 | Hawaii, United States |
| Sieg | 10-1 | Curtis Crawford | Submission (forearm choke) | | SB 24: Return of the Heavyweights 1 | Apr 26, 2002 | 1 | 1:03 | Hawaii, United States |
| Sieg | 9-1 | Mike Priest | Submission (injury) | | Freestyle Combat Challenge 7 | Mar 23, 2002 | 1 | N/A | Wisconsin, United States |
| Sieg | 8-1 | Kerry Schall | Submission (injury) | | Extreme Challenge 46 | Feb 16, 2002 | 1 | 7:29 | Iowa, United States |
| Sieg | 7-1 | Mike Radnov | TKO (cut) | | Extreme Challenge 46 | Feb 16, 2002 | 1 | 5:54 | Iowa, United States |
| Sieg | 6-1 | Mike Marshalleck | TKO | | Freestyle Combat Challenge 6 | Jan 05, 2002 | 1 | 0:38 | Wisconsin, United States |
| Sieg | 5-1 | Steve Hutson | Submission (arm triangle choke) | | SC 8: Fight Night | Nov 10, 2001 | 1 | 3:35 | Illinois, United States |
| Niederlage | 4-1 | Tim Sylvia | Decision (unanimous) | | Extreme Challenge 42 | Aug 24, 2001 | 3 | 5:00 | Davenport, Iowa, U.S. |
| Sieg | 4-0 | Bill Billington | Submission (knees) | | Iowa Challenge 2 | Aug 11, 2001 | 1 | 1:07 | Iowa, United States |
| Sieg | 3-0 | Anthony Ferguson | TKO (referee stoppage) | | Dangerzone: Auburn | Apr 28, 2001 | 1 | 1:00 | Indiana, United States |
| Sieg | 2-0 | Darren Block | KO (punch) | | Dangerzone: Auburn | Apr 28, 2001 | 1 | 0:16 | Indiana, United States |
| Sieg | 1-0 | Rob Shinkle | TKO (corner stoppage) | | Freestyle Combat Challenge 3 | Jan 06, 2001 | 1 | 0:21 | Racine, Wisconsin, United States |
