| Niederlage | 15-9 | Tito Ortiz  | Decision (split) |  | Bellator 131 | Nov 15, 2014 | 3 | 5:00 | San Diego, United States |
| Niederlage | 15-8 | Anderson Silva  | TKO (knee to the chest & punches) | | UFC 153: Silva vs Bonnar | Oct 13, 2012 | 1 | 4:40 | Rio de Janeiro, Brazil |
| Sieg | 15-7 | Kyle Kingsbury | Decision (unanimous) |  | UFC 139 | Nov 19, 2011 | 3 | 5:00 | California, United States |
| Sieg | 14-7 | Igor Pokrajac  | Decision (unanimous) |  | The Ultimate Fighter | Dec 04, 2010 | 3 | 5:00 | Nevada, United States |
| Sieg | 13-7 | Krzysztof Soszynski  | TKO (knee and punches) |  | UFC 116 | Jul 03, 2010 | 2 | 3:08 | Nevada, United States |
| Niederlage | 12-7 | Krzysztof Soszynski | TKO (cut) |  | UFC 110 | Feb 21, 2010 | 3 | 1:04 | Sydney, Australia |
| Niederlage | 12-6 | Mark Coleman | Decision (unanimous) |  | UFC 100 | Jul 11, 2009 | 3 | 5:00 | Las Vegas, Nevada, U.S. |
| Niederlage | 12-5 | Jon Jones | Decision (unanimous) |  | UFC 94 | Jan 31, 2009 | 3 | 5:00 | Las Vegas, United States |
| Sieg | 12-4 | Eric Schafer | TKO (strikes) |  | UFC 77 | Oct 25, 2007 | 2 | 2:47 | Cincinnati, Ohio, United States |
| Sieg | 11-4 | Mike Nickels | Submission (rear naked choke) | | UFC 73 | Jul 07, 2007 | 1 | 2:14 | Sacramento, United States |
| Niederlage | 10-4 | Forrest Griffin | Decision (unanimous) |  | UFC 62 | Aug 26, 2006 | 3 | 5:00 | Las Vegas, United States |
| Niederlage | 10-3 | Rashad Evans | Decision (majority) | | UFC Ultimate Fight Night 5 | Jun 28, 2006 | 3 | 5:00 | Las Vegas, United States |
| Sieg | 10-2 | Keith Jardine | Decision (unanimous) | | UFN 4 | Apr 06, 2006 | 3 | 5:00 | Nevada, United States |
| Sieg | 9-2 | James Irvin | Technical Submission | | UFC Ultimate FN 3 | Jan 16, 2006 | 1 | 4:30 | Nevada, United States |
| Sieg | 8-2 | Sam Hoger | Decision (unanimous) | | UFC Ultimate FN | Aug 06, 2005 | 3 | 5:00 | Nevada, United States |
| Niederlage | 7-2 | Forrest Griffin | Decision (unanimous) | | The Ultimate Fighter 1 Finale | Apr 09, 2005 | 3 | 5:00 | Las Vegas, United States |
| Sieg | 7-1 | Sean Sallee | Submission (triangle choke) | | IHC 7-The Crucible | Jun 05, 2004 | 1 | 2:28 | Hammond, United States |
| Sieg | 6-1 | William Hill | TKO (punches) | | Total Fight Challenge 1 | Apr 24, 2004 | 1 | N/A | Hammond, United States |
| Sieg | 5-1 | Brad Lynde | Submission (rear naked choke) | | IHC 6: Inferno | Nov 22, 2003 | 1 | 4:10 | Hammond, United States |
| Niederlage | 4-1 | Lyoto Machida | TKO (cut) | | Jungle Fight 1 | Sep 13, 2003 | 1 | 4:21 | Manaus, Brazil |
| Sieg | 4-0 | Terry Martin | Decision (unanimous) | | Maximum Fighting Challenge | Sep 07, 2002 | 1 | 10:00 | Hammond, United States |
| Sieg | 3-0 | Jay Massey | Submission (guillotine choke) | | UA 1: The Genesis | Jan 27, 2002 | 1 | 1:09 | Hammond, United States |
| Sieg | 2-0 | Josh Kruger | Submission (armbar) | | IHC 3: Exodus | Nov 10, 2001 | 1 | 2:55 | Hammond, United States |
| Sieg | 1-0 | Brian Ebersole | Submission (guillotine choke) | | IHC 3: Exodus | Nov 10, 2001 | 1 | 0:51 | Hammond, United States |
