| Niederlage | 37-11 | Jacob Noe | TKO (Punches) |  | Bellator 96 | Jun 19, 2013 | 3 | 3:32 | Thackerville, United States |
| Niederlage | 37-10 | Mikhail Zayats  | TKO (punches) | | Bellator 85 | Jan 17, 2013 | 1 | 4:49 | California, United States |
| Sieg | 37-9 | Tatsuya Mizuno  | Submission (armbar) | | One FC 4 | Jun 23, 2012 | 1 | 0:31 | Stadium Negara, Malaysia |
| Niederlage | 36-9 | Dan Henderson  | KO (punches) |  | Strikeforce: St. Louis | Dec 04, 2010 | 1 | 1:53 | St. Louis, Missouri, U.S. |
| Sieg | 36-8 | Robbie Lawler | Decision (unanimous) |  | Strikeforce: Los Angeles | Jun 16, 2010 | 3 | 5:00 | Los Angeles, California, U.S. |
| Niederlage | 35-8 | Gegard Mousasi  | KO (punches) |  | Strikeforce: Carano vs. Cyborg | Aug 15, 2009 | 1 | 1:00 | San Jose, California, U.S. |
| Sieg | 35-7 | Rameau Thierry Sokoudjou  | Submission (d'arce choke) |  | Affliction: Day of Reckoning | Jan 24, 2009 | 2 | 2:38 | Anaheim, United States |
| Sieg | 34-7 | Bobby Southworth | TKO (cut) |  | Strikeforce: Destruction | Nov 21, 2008 | 1 | 5:00 | San Jose, California, U.S. |
| Sieg | 33-7 | Mike Whitehead | Decision (unanimous) | | Affliction: Banned | Jul 19, 2008 | 3 | 5:00 | Anaheim, California, U.S. |
| Sieg | 32-7 | Rodney Glunder | Submission (arm-triangle choke) | | Ring of Fire | Dec 09, 2007 | 3 | N/A | Manila, Philippines  |
| Sieg | 31-7 | David Heath | Submission (anaconda choke) | | UFC 74 | Aug 25, 2007 | 2 | 3:30 | Las Vegas, Nevada, U.S. |
| Niederlage | 30-7 | Jason Lambert | KO (punch) | | UFC 68 | Mar 03, 2007 | 2 | 3:26 | Columbus, Ohio, U.S. |
| Niederlage | 30-6 | Chuck Liddell | TKO (punches) |  | UFC 62 | Aug 26, 2006 | 1 | 1:35 | Las Vegas, United States |
| Sieg | 30-5 | Mike Van Arsdale | Submission (rear-naked choke) | | UFC 57 | Feb 04, 2006 | 1 | 2:21 | Las Vegas, Nevada, U.S. |
| Sieg | 29-5 | Chael Sonnen | Submission (triangle choke) | | UFC 55 | Oct 07, 2005 | 2 | 1:20 | Uncasville, Connecticut, U.S. |
| Sieg | 28-5 | Travis Wiuff | Submission (armbar) | | UFC 52 | Apr 16, 2005 | 2 | 0:24 | Las Vegas, Nevada, U.S. |
| Sieg | 27-5 | Pierre Guillet | Submission (punches) | | Cage Rage 10: Deliverance | Feb 26, 2005 | 1 | 1:57 | London, England |
| Sieg | 26-5 | Cyrille Diabaté  | Submission (guillotine choke) | | Cage Rage 9: No Mercy | Nov 27, 2004 | 1 | 3:38 | London, England  |
| Sieg | 25-5 | José Landi-Jons | Decision (unanimous) | | Jungle Fight 3 | Oct 23, 2004 | 3 | 5:00 | Manaus, Brazil |
| Sieg | 24-5 | Jeremy Horn | Decision (unanimous) | | International Fighting Championships | Sep 06, 2003 | 3 | 5:00 | Denver, Colorado, U.S. |
| Sieg | 23-5 | Mauricio Rua  | Submission (guillotine choke) | | IFC: Global Domination | Sep 06, 2003 | 3 | 3:07 | Denver, Colorado, U.S. |
| Sieg | 22-5 | Trevor Prangley  | Decision (unanimous) | | IFC: Global Domination | Sep 06, 2003 | 3 | 5:00 | Denver, Colorado, U.S. |
| Sieg | 21-5 | Marcelo Azevedo | Decision (unanimous) | | Heat FC 1: Genesis | Jul 31, 2003 | 3 | 5:00 | Natal, Brazil |
| Niederlage | 20-5 | Chuck Liddell | TKO |  | UFC 40 | Nov 22, 2002 | 1 | 2:55 | Las Vegas, United States |
| Sieg | 20-4 | Elvis Sinosic | Decision (unanimous) | | UFC 38 | Jul 13, 2002 | 3 | 5:00 | London, England |
| Niederlage | 19-4 | Kevin Randleman | Decision (unanimous) | | UFC 35 | Jan 11, 2002 | 3 | 5:00 | Uncasville, Connecticut, U.S. |
| Niederlage | 19-3 | Fedor Emelianenko | Decision (unanimous) | | RINGS: 10th Anniversary | Aug 11, 2001 | 2 | 5:00 | Tokyo, Tokyo, Japan |
| Sieg | 19-2 | Tsuyoshi Kohsaka | Decision (majority) | | Fighting Network Rings: World Title Series 2 | Jun 15, 2001 | 3 | 5:00 | Tokyo, Japan |
| Sieg | 18-2 | Kiyoshi Tamura | Decision (majority) | | Fighting Network Rings: King of Kings 2000 Final | Feb 24, 2001 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 17-2 | Maurice Smith | Decision (unanimous) |  | UFC 28 | Nov 17, 2000 | 3 | 5:00 | Atlantic City, New Jersey, U.S. |
| Niederlage | 16-2 | Valentijn Overeem | Submission (toe hold) | | Fighting Network Rings: King of Kings 2000 Block A | Oct 09, 2000 | 1 | 2:19 | Tokyo, Japan |
| Sieg | 16-1 | Tariel Bitsadze | Submission (armbar) | | Fighting Network Rings: King of Kings 2000 Block A | Oct 09, 2000 | 1 | 2:58 | Tokyo, Japan |
| Sieg | 15-1 | Hiromitsu Kanehara | Decision (unanimous) | | Fighting Network Rings: Millennium Combine 2 | Jun 15, 2000 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 14-1 | Jacob Zobnin | Submission (rear naked choke) | | Fighting Network Rings Russia | May 20, 2000 | 1 | 3:20 | Tokyo, Japan |
| Sieg | 13-1 | Travis Fulton | Submission (armbar) | | Fighting Network Rings: Millennium Combine 1 | Apr 20, 2000 | 1 | 4:49 | Tokyo, Japan |
| Sieg | 12-1 | Kiyoshi Tamura | Decision (majority) | | Fighting Network Rings: King of Kings 1999 Final | Feb 26, 2000 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 11-1 | Mikhail Ilyukhin | Submission (armbar) | | Fighting Network Rings: King of Kings 1999 Final | Feb 26, 2000 | 3 | 0:40 | Tokyo, Japan |
| Niederlage | 10-1 | Dan Henderson | Decision (majority) | | King of Kings Tournament 1999 | Feb 26, 2000 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 10-0 | Brad Kohler | KO (soccer kick) | | World Extreme Fighting: 8-Goin' Platinum | Jan 15, 2000 | 2 | 0:50 | Rome, Georgia |
| Sieg | 9-0 | Zaza Tkeshelashvili  | Submission (kimura) | | Fighting Network Rings: King of Kings 1999 Block A | Oct 28, 1999 | 2 | 1:11 | Tokyo, Japan |
| Sieg | 8-0 | Lee Hasdell | Decision (unanimous) | | Fighting Network Rings: King of Kings 1999 Block A | Oct 28, 1999 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 7-0 | Dario Amorim | Submission (punches) | | BVF 14: Circuito Brasileiro de Vale Tudo 5 | Jul 24, 1999 | 1 | 2:14 | Brazil |
| Sieg | 6-0 | Pedro Otavio | Submission (punches) | | BVF 14: Circuito Brasileiro de Vale Tudo 5 | Jul 24, 1999 | 1 | 4:34 | Brazil |
| Sieg | 5-0 | Augusto Menezes Santos | Submission (keylock) | | BVF 14: Circuito Brasileiro de Vale Tudo 5 | Jul 24, 1999 | 1 | 0:56 | Brazil |
| Sieg | 4-0 | Fernando Cerchiari | KO (punches) | | International Vale Tudo Championship 8 | Jan 20, 1999 | 1 | 4:41 | Aracaju, Brazil |
| Sieg | 3-0 | Marco Vinicios | TKO (retirement) | | Desafio: Rio vs. São Paulo | Sep 27, 1997 | 2 | 4:58 | Brazil |
| Sieg | 2-0 | Manoel Vicente | TKO (punches and stomp) | | Desafio: Rio vs. São Paulo | Sep 27, 1997 | 1 | 6:27 | Brazil |
| Sieg | 1-0 | Claudio Palma | Submission (leg kicks) | | Desafio: Rio vs. São Paulo | Sep 27, 1997 | 1 | 2:08 | Brazil |
