| Niederlage | 38-14 | Fedor Emelianenko  | TKO (Punches) |  | Bellator & Rizin 237: Japan | Dec 29, 2019 | 1 | 2:44 | Saitama, Japan |
| Sieg | 38-13 | Wanderlei Silva  | TKO (punches) |  | Bellator 206: Mousasi vs MacDonald | Sep 29, 2018 | 2 | 4:32 | San Jose, California, United States |
| Niederlage | 37-13 | Chael Sonnen  | Decision (unanimous) |  | Bellator Heavyweight World Grand Prix Tournament | Jan 20, 2018 | 3 | 5:00 | Inglewood, California, United States |
| Niederlage | 37-12 | Muhammed Lawal | Decision (unanimous) |  | Bellator 175: Rampage vs King Mo 2 | Mar 31, 2017 | 3 | 5:00 | Rosemont, Illinois, United States |
| Sieg | 37-11 | Satoshi Ishii  | Decision (split) | | Bellator 157: Dynamite 2 | Jun 24, 2016 | 3 | 5:00 | St. Louis, Missouri, United States |
| Sieg | 36-11 | Fabio Maldonado | Decision (unanimous) |  | UFC 186: Johnson vs Horiguchi | Apr 25, 2015 | 3 | 5:00 | Montreal, Quebec, Canada |
| Sieg | 35-11 | Muhammed Lawal | Decision (unanimous) |  | Bellator 120 | May 17, 2014 | 3 | 5:00 | Southaven, United States |
| Sieg | 34-11 | Christian M'Pumbu  | KO (punches) |  | Bellator 110 | Feb 28, 2014 | 1 | 4:34 | Uncasville, United States |
| Sieg | 33-11 | Joey Beltran | KO (punches) |  | Bellator 108 | Nov 15, 2013 | 1 | 4:59 | Atlantic City, United States |
| Niederlage | 32-11 | Glover Teixeira | Decision (unanimous) | | UFC on Fox 6: Johnson vs Dodson | Jan 26, 2013 | 3 | 5:00 | Chicago, United States |
| Niederlage | 32-10 | Ryan Bader | Decision (unanimous) | | UFC 144 | Feb 26, 2012 | 3 | 5:00 | Saitama, Japan |
| Niederlage | 32-9 | Jon Jones | Submission (rear-naked choke) | | UFC 135 | Sep 24, 2011 | 4 | 1:14 | Denver, United States |
| Sieg | 32-8 | Matt Hamill | Decision (unanimous) |  | UFC 130 | May 28, 2011 | 3 | 5:00 | Las Vegas, United States |
| Sieg | 31-8 | Lyoto Machida | Decision (split) |  | UFC 123 | Nov 20, 2010 | 3 | 5:00 | Auburn Hills, United States |
| Niederlage | 30-8 | Rashad Evans | Decision (unanimous) |  | UFC 114 | May 29, 2010 | 3 | 5:00 | Las Vegas, United States |
| Sieg | 30-7 | Keith Jardine | Decision (unanimous) |  | UFC 96 | Mar 07, 2009 | 3 | 5:00 | Columbus, Ohio, United States |
| Sieg | 29-7 | Wanderlei Silva | KO (punch) |  | UFC 92 | Dec 27, 2008 | 1 | 3:21 | Las Vegas, United States |
| Niederlage | 28-7 | Forrest Griffin | Decision (unanimous) |  | UFC 86 | Jul 05, 2008 | 5 | 5:00 | Las Vegas, United States |
| Sieg | 28-6 | Dan Henderson | Decision (unanimous) | | UFC 75 | Sep 08, 2007 | 5 | 5:00 | London, England |
| Sieg | 27-6 | Chuck Liddell | KO (punches) |  | UFC 71 | May 26, 2007 | 1 | 1:53 | Las Vegas, United States |
| Sieg | 26-6 | Marvin Eastman | KO (punches) | | UFC 67 | Feb 03, 2007 | 2 | 3:49 | Las Vegas, United States |
| Sieg | 25-6 | Matt Lindland | Decision (split) |  | WFA: King of the Streets | Jul 22, 2006 | 3 | 5:00 | Los Angeles, United States |
| Sieg | 24-6 | Yoon Dong-Sik | Decision (unanimous) | | Pride 31 | Feb 26, 2006 | 3 | 5:00 | Saitama, Saitama, Japan |
| Sieg | 23-6 | Hirotaka Yokoi | TKO (soccer kick and stomp) | | Pride 30 | Oct 23, 2005 | 1 | 4:05 | Saitama, Saitama, Japan |
| Niederlage | 22-6 | Mauricio Rua | TKO (soccer kicks) | | Pride Total Elimination 2005 | Apr 23, 2005 | 1 | 4:47 | Osaka, Osaka, Japan |
| Sieg | 22-5 | Murilo Rua | Decision (split) | | Pride 29 | Feb 20, 2005 | 3 | 5:00 | Saitama, Saitama, Japan |
| Niederlage | 21-5 | Wanderlei Silva | KO (knees) | | Pride 28 | Oct 31, 2004 | 2 | 3:26 | Saitama, Saitama, Japan |
| Sieg | 21-4 | Ricardo Arona | KO (slam) |  | Pride Critical Countdown 2004 | Jun 20, 2004 | 1 | 7:32 | Saitama, Saitama, Japan |
| Sieg | 20-4 | Ikuhisa Minowa | TKO (knee) | | Pride Shockwave 2003 | Dec 31, 2003 | 2 | 1:05 | Saitama, Saitama, Japan |
| Niederlage | 19-4 | Wanderlei Silva | TKO (knees) | | Pride Final Conflict 2003 | Nov 09, 2003 | 1 | 6:28 | Tokyo, Japan |
| Sieg | 19-3 | Chuck Liddell | TKO (punches) |  | Pride Final Conflict 2003 | Nov 09, 2003 | 2 | 3:10 | Tokyo, Japan |
| Sieg | 18-3 | Murilo Bustamante | Decision (split) | | Pride Total Elimination 2003 | Aug 10, 2003 | 3 | 5:00 | Saitama, Saitama, Japan |
| Sieg | 17-3 | Mikhail Ilyukhin | Submission (knee to the body) |  | Pride 26 | Jun 08, 2003 | 1 | 6:26 | Yokohama, Japan |
| Sieg | 16-3 | Kevin Randleman | KO (punches) | | Pride 25 | Mar 16, 2003 | 1 | 6:58 | Yokohama, Kanagawa, Japan |
| Sieg | 15-3 | Igor Vovchanchyn  | Submission (injury) | | Pride 22 | Sep 29, 2002 | 1 | 7:17 | Nagoya, Aichi, Japan |
| Sieg | 14-3 | Sean Gray | TKO (punches) | | King of the Cage 13: Revolution | May 17, 2002 | 3 | 0:37 | Reno, Nevada, United States |
| Sieg | 13-3 | Masaaki Satake | TKO (slam) | | Pride 20 | Apr 28, 2002 | 1 | 7:07 | Yokohama, Kanagawa, Japan |
| Niederlage | 12-3 | Daijiro Matsui | DQ (knee to groin) | | Pride 18 | Dec 23, 2001 | 1 | 0:14 | Fukuoka, Fukuoka, Japan |
| Sieg | 12-2 | Yuki Ishikawa | KO (punches) | | Pride 17 | Nov 03, 2001 | 1 | 1:52 | Tokyo, Japan |
| Sieg | 11-2 | Alexander Otsuka | TKO (doctor stoppage) | | BattlArts: BattlArts vs. the World | Oct 14, 2001 | 2 | 5:00 | Tokyo, Japan |
| Niederlage | 10-2 | Kazushi Sakuraba | Submission (rear naked choke) | | Pride 15 | Jul 29, 2001 | 1 | 5:41 | Saitama, Saitama, Japan |
| Sieg | 10-1 | Kenneth Williams | Submission (rear naked choke) | | Gladiator Challenge 4 | Jun 17, 2001 | 1 | 4:40 | California, United States |
| Sieg | 9-1 | Bryson Howvreck | Submission (punches) | | KOTC Bombs Away | Apr 29, 2001 | 1 | 1:48 | California, United States |
| Sieg | 8-1 | Rocko Henderson | Submission (kimura) | | Gladiator Challenge 3 | Apr 07, 2001 | 2 | 1:15 | California, United States |
| Sieg | 7-1 | Dave Taylor | TKO (corner stoppage) | | Gladiator Challenge 2 | Feb 18, 2001 | 1 | 5:00 | California, United States |
| Sieg | 6-1 | Charles West | Decision (unanimous) | | Gladiator Challenge 1 | Dec 09, 2000 | 3 | 5:00 | California, United States |
| Sieg | 5-1 | Rob Smith | Decision (unanimous) | | KOTC 6: Road Warriors | Nov 29, 2000 | 3 | 5:00 | Michigan, United States |
| Sieg | 4-1 | Warren Owsley | Submission (armbar) | | Dangerzone: Night of the Beast | Oct 28, 2000 | 1 | 6:04 | Virginia, United States |
| Sieg | 3-1 | Ron Rumpf | TKO (punches) | | Continental Freefighting Alliance 2 | Jul 19, 2000 | 1 | 1:18 | United States |
| Niederlage | 2-1 | Marvin Eastman | Decision (unanimous) | | KOTC 4: Gladiators | Jun 24, 2000 | 2 | 5:00 | San Jacinto, United States |
| Sieg | 2-0 | Marco Bermudaz | Submission (rear naked choke) | | Huntington Beach Underground Pancrase | May 13, 2000 | 2 | 7:17 | California, United States |
| Sieg | 1-0 | Mike Pyle | Decision (unanimous) | | ISCF: Memphis | Nov 13, 1999 | 3 | 5:00 | Tennessee, United States |
