| Niederlage | 20-9-1 (1) | Ruben Villareal  | KO (punches) | | Gladiator Challenge: Mega Stars | Dec 11, 2011 | 1 | 2:30 | Lincoln, California, United States |
| Niederlage | 20-8-1 (1) | Dave Herman | TKO (punches) | | Shark Fights 6: Frye vs. Herman | Sep 12, 2009 | 1 | 1:00 | Amarillo, Texas, United States |
| Sieg | 20-7-1 (1) | Ritch Moss | Submission (rear naked choke) | | Shark Fights 4: Richards vs Schoonover | May 02, 2009 | 1 | 2:48 | Lubbock, Texas, United States |
| Niederlage | 19-7-1 (1) | Ikuhisa Minowa  | Submission (kneebar) | | Deep: Gladiator | Aug 16, 2008 | 1 | 3:56 | Okayama, Japan |
| Sieg | 19-6-1 (1) | Bryan Pardoe | KO (punches) | | NLF: Heavy Hands | Jan 26, 2008 | 1 | 0:47 | Dallas, Texas, United States |
| Niederlage | 18-6-1 (1) | James Thompson  | TKO (punches) |  | Pride 34 | Apr 08, 2007 | 1 | 6:23 | Saitama, Saitama, Japan |
| Sieg | 18-5-1 (1) | Kim Min-Soo | KO (punch) |  | Hero's 7 | Oct 09, 2006 | 2 | 2:47 | Yokohama, Japan |
| Sieg | 17-5-1 (1) | Yoshihisa Yamamoto | Submission (rear naked choke) |  | Hero's 6 | Aug 05, 2006 | 1 | 4:52 | Tokyo, Japan |
| Unentschieden | 16-5-1 (1) | Ruben Villareal | Draw |  | KOTC: Predator | May 13, 2006 | 3 | 5:00 | Globe, Arizona, United States |
| Sieg | 16-5 (1) | Akebono | Submission (guillotine choke) | | Hero's 5 | May 03, 2006 | 2 | 3:50 | Tokyo, Japan |
| Niederlage | 15-5 (1) | Yoshihiro Nakao | Decision (unanimous) | | K-1 Premium 2004 Dynamite | Dec 31, 2004 | 3 | 5:00 | Osaka, Japan |
| NC | 15-4 (1) | Yoshihiro Nakao | No contest (cut caused by accidental headbutt) |  | K-1 MMA ROMANEX | May 22, 2004 | 1 | 1:19 | Saitama, Japan |
| Niederlage | 15-4 | Gary Goodridge  | KO (head kick) |  | PRIDE Shockwave 2003 | Dec 31, 2003 | 1 | 0:39 | Saitama, Saitama, Japan |
| Niederlage | 15-3 | Mark Coleman | Decision (unanimous) |  | Pride 26 | Jun 08, 2003 | 3 | 5:00 | Yokohama, Kanagawa, Japan |
| Niederlage | 15-2 | Hidehiko Yoshida | Technical submission (armbar) |  | PRIDE 23 | Nov 24, 2002 | 1 | 5:32 | Tokyo, Japan |
| Sieg | 15-1 | Yoshihiro Takayama | TKO (punches) |  | Pride 21 | Jun 23, 2002 | 1 | 6:10 | Saitama, Japan |
| Sieg | 14-1 | Ken Shamrock | Decision (split) |  | Pride 19 | Feb 24, 2002 | 3 | 5:00 | Saitama, Japan |
| Sieg | 13-1 | Cyril Abidi | Submission (rear naked choke) | | Inoki Bom-Ba-Ye 2001 | Dec 31, 2001 | 2 | 0:33 | Saitama, Japan |
| Sieg | 12-1 | Gilbert Yvel  | DQ (gouging the eyes) | | Pride 16 | Sep 24, 2001 | 1 | 7:27 | Osaka Castle Hall, Japan |
| Sieg | 11-1 | Eric Valdez | Submission (choke) | | Unified Shoot Wrestling Federation 5 | Jun 20, 1997 | 1 | 0:49 | Amarillo, Texas, United States |
| Sieg | 10-1 | David Abbott | Submission (rear-naked choke) | | Ultimate Ultimate 96 | Dec 07, 1996 | 1 | 1:22 | Birmingham, United States |
| Sieg | 9-1 | Mark Hall | Submission (achilles lock) | | Ultimate Ultimate 96 | Dec 07, 1996 | 1 | 0:20 | Birmingham, Alabama, United States |
| Sieg | 8-1 | Gary Goodridge | Submission (fatigue) | | Ultimate Ultimate 1996 | Dec 07, 1996 | 1 | 11:19 | Birmingham, Alabama, United States |
| Sieg | 7-1 | Mark Hall | Submission (forearm choke) | | U-Japan | Nov 17, 1996 | 1 | 5:29 | Japan |
| Niederlage | 6-1 | Mark Coleman | TKO (punches) | | UFC 10 | Jul 12, 1996 | 1 | 11:34 | Birmingham, Alabama, U.S. |
| Sieg | 6-0 | Brian Johnston | TKO (submission to elbow) | | UFC 10 | Jul 12, 1996 | 1 | 4:37 | Birmingham, Alabama, United States |
| Sieg | 5-0 | Mark Hall | TKO (punches) | | UFC 10 | Jul 12, 1996 | 1 | 10:21 | Birmingham, Alabama, United States |
| Sieg | 4-0 | Amaury Bitetti | TKO (punches) | | UFC 9 | May 17, 1996 | 1 | 9:22 | Detroit, Michigan, United States |
| Sieg | 3-0 | Gary Goodridge | Submission (strikes) | | UFC 8 | Feb 16, 1996 | 1 | 2:14 | San Juan, Puerto Rico  |
| Sieg | 2-0 | Sam Adkins | TKO (doctor stoppage) | | UFC 8 | Feb 16, 1996 | 1 | 0:48 | Bayamón, Puerto Rico |
| Sieg | 1-0 | Thomas Ramirez | KO (punch) | | UFC 8 | Feb 16, 1996 | 1 | 0:08 | Bayamón, Puerto Rico |
