| Result | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
| Loss | 19-6 (1) | Dennis Hallman | TKO (Strikes) | UFC 123: Rampage vs. Machida | November 20, 2010 | 1 | 1:47 | Auburn Hills, Michigan | |
| Win | 19-5 (1) | Ben Mortimer | Submission (Rear-Naked Choke) | Impact FC 1 - The Uprising: Brisbane | July 10, 2010 | 2 | 4:18 | Brisbane, Australia | |
| NC | 18–5 (1) | Dong Hyun Kim | No Contest | UFC 94: St-Pierre vs. Penn 2 | January 31, 2009 | 3 | 5:00 | Las Vegas, Nevada | Original win (Split Decision); changed after Parisyan tests positive for banned painkillers in post-fight drug test. |
| Loss | 18–5 | Thiago Alves | TKO (Strikes) | UFC Fight Night 13 | April 2, 2008 | 2 | 0:34 | Broomfield, Colorado | |
| Win | 18–4 | Ryo Chonan | Decision (Unanimous) | UFC 78: Validation | November 17, 2007 | 3 | 5:00 | Newark, New Jersey | |
| Win | 17–4 | Josh Burkman | Decision (Unanimous) | UFC 71: Liddell vs. Jackson | May 26, 2007 | 3 | 5:00 | Las Vegas, Nevada | |
| Win | 16–4 | Drew Fickett | Decision (Unanimous) | UFC Fight Night 7 | December 13, 2006 | 3 | 5:00 | San Diego, California | |
| Loss | 15–4 | Diego Sanchez | Decision (Unanimous) | UFC Fight Night 6 | August 17, 2006 | 3 | 5:00 | Las Vegas, Nevada | |
| Win | 15–3 | Nick Thompson | Submission (Strikes) | UFC 59: Reality Check | April 15, 2006 | 1 | 4:44 | Anaheim, California | |
| Win | 14–3 | Matt Serra | Decision (Unanimous) | UFC 53: Heavy Hitters | June 4, 2005 | 3 | 5:00 | Atlantic City, New Jersey | |
| Win | 13–3 | Chris Lytle | Decision (Unanimous) | UFC 51: Super Saturday | February 5, 2005 | 3 | 5:00 | Las Vegas, Nevada | |
| Win | 12–3 | Nick Diaz | Decision (Split) | UFC 49: Unfinished Business | August 21, 2004 | 3 | 5:00 | Las Vegas, Nevada | |
| Win | 11–3 | Shonie Carter | Decision (Unanimous) | WEC 10 | May 21, 2004 | 3 | 5:00 | Lemoore, California | Won WEC Welterweight Championship |
| Loss | 10–3 | Georges St. Pierre | Decision (Unanimous) | UFC 46: Supernatural | January 31, 2004 | 3 | 5:00 | Las Vegas, Nevada | |
| Win | 10–2 | Dave Strasser | Submission (kimura) | UFC 44: Undisputed | September 26, 2003 | 1 | 3:52 | Las Vegas, Nevada | |
| Win | 9–2 | Fernando Vasconcelos | Decision | KOTC 22 | March 23, 2003 | 3 | 5:00 | San Jacinto, California | |
| Win | 8–2 | Antonio McKee | Decision | UAGF 3 | February 15, 2003 | N/A | N/A | Hollywood, California | |
| Win | 7–2 | Darrell Smith | Submission | RSF 3 | March 30, 2001 | 1 | 0:59 | Belleville, Illinois | |
| Loss | 6–2 | Sean Sherk | TKO (Towel) | RSF 2 | January 5, 2001 | 1 | 16:20 | Belleville, Illinois | |
| Loss | 6–1 | Sean Sherk | Decision | RSF 1 | October 10, 2000 | 1 | 18:00 | Belleville, Illinois | |
| Win | 6–0 | Guido Jennings | Submission (Choke) | KK 16 | June 7, 1999 | 1 | 6:33 | California | |
| Win | 5–0 | Justin Bumphus | Submission | ESF | May 15, 1999 | N/A | N/A | Corona, California | |
| Win | 4–0 | Scott Davis | Submission (Armbar) | KK 14 | April 5, 1999 | 1 | 2:16 | Los Angeles, California | |
| Win | 3–0 | Jason Rittgers | Submission (Armbar) | KK 14 | April 5, 1999 | 1 | 1:58 | Los Angeles, California | |
| Win | 2–0 | Zach McKinney | Submission (Strikes) | KK 12 | February 1, 1999 | 1 | 0:23 | Los Angeles, California | |
| Win | 1–0 | Brian Warren | Submission (Ankle Lock) | KK 12 | February 1, 1999 | 1 | 0:44 | Los Angeles, California | |
