| Niederlage | 14-6 | Jose Aldo  | Decision (unanimous) |  | UFC 136 | Oct 08, 2011 | 5 | 5:00 | Houston, United States |
| Sieg | 14-5 | Diego Nunes | Decision (unanimous) |  | UFC 131 | Jun 11, 2011 | 3 | 5:00 | British Columbia, Canada |
| Niederlage | 13-5 | Gray Maynard  | Decision (unanimous) |  | UFC 118 | Aug 28, 2010 | 3 | 5:00 | Massachusetts, United States |
| Sieg | 13-4 | Takanori Gomi  | Submission (rear-naked choke) |  | UFC FN: Florian vs. Gomi | Mar 31, 2010 | 3 | 2:52 | Charlotte, United States |
| Sieg | 12-4 | Clay Guida | Submission (rear-naked choke) |  | UFC 107 | Dec 12, 2009 | 2 | 2:19 | Memphis, United States |
| Niederlage | 11-4 | B.J. Penn | Submission (rear-naked choke) |  | UFC 101 | Aug 08, 2009 | 4 | 3:54 | Philadelphia |
| Sieg | 11-3 | Joe Stevenson | Submission (rear-naked choke) |  | UFC 91 | Nov 15, 2008 | 1 | 4:03 | Nevada, United States |
| Sieg | 10-3 | Roger Huerta | Decision (unanimous) |  | UFC 87 | Aug 09, 2008 | 3 | 5:00 | Minnesota, United States |
| Sieg | 9-3 | Joe Lauzon | TKO (punches and elbows) | | UFC Fight Night: | Apr 02, 2008 | 2 | 3:28 | Broomfield, United States |
| Sieg | 8-3 | Din Thomas | Submission (rear-naked choke) | | UFC Fight Night: | Sep 19, 2007 | 1 | 4:31 | Nevada, United States |
| Sieg | 7-3 | Alvin Robinson | Submission (punches) | | UFC 73 | Jul 07, 2007 | 1 | 4:30 | California, United States |
| Sieg | 6-3 | Dokonjonosuke Mishima | Technical Submission |  | UFC Fight Night: Stevenson vs Guillard | Apr 05, 2007 | 3 | 3:57 | Nevada, United States |
| Niederlage | 5-3 | Sean Sherk | Decision (unanimous) |  | UFC 64 | Oct 14, 2006 | 5 | 5:00 | Nevada, United States |
| Sieg | 5-2 | Sam Stout  | Submission (rear-naked choke) | | The Ultimate Fighter 3 F | Jun 24, 2006 | 1 | 1:46 | Nevada, United States |
| Sieg | 4-2 | Kit Cope | Submission (rear-naked choke) | | The Ultimate Fighter 2 | Nov 05, 2005 | 2 | 0:37 | Nevada, United States |
| Sieg | 3-2 | Alex Karalexis | TKO (doctor stoppage) | | UFC Ultimate FN | Aug 06, 2005 | 2 | 2:52 | Nevada, United States |
| Niederlage | 2-2 | Diego Sanchez | TKO (punches) | | The Ultimate FF | Apr 09, 2005 | 1 | 2:49 | Nevada, United States |
| Niederlage | 2-1 | Drew Fickett | Decision (split) | | CZ 7: Gravel Pit | Jul 10, 2004 | 3 | 5:00 | Revere, United States |
| Sieg | 2-0 | Bobby McAndrews | Submission (kimura) | | Mass Destruction 15 | Feb 21, 2004 | 1 | 1:57 | Boston, United States |
| Sieg | 1-0 | Jason Giroux | KO (punch) | | Mass Destruction 10 | Jan 25, 2003 | 1 | 0:07 | Taunton, United States |
