| 2010-11-20 | UFC 123: Rampage vs. Machida | Welterweight | Dennis Hallman def. Karo Parisyan | TKO (punches) | 1 | 1:47 |
| 2009-01-31 | UFC 94: St-Pierre vs. Penn 2 | Welterweight | Karo Parisyan vs. Kim Dong-hyun | No Contest (overturned) | 3 | 5:00 |
| 2008-04-02 | UFC Fight Night: Florian vs. Lauzon | Welterweight | Thiago Alves def. Karo Parisyan | TKO (punches) | 2 | 0:34 |
| 2007-11-17 | UFC 78: Validation | Welterweight | Karo Parisyan def. Ryo Chonan | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2007-05-26 | UFC 71: Liddell vs. Jackson | Welterweight | Karo Parisyan def. Josh Burkman | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2006-12-13 | UFC Fight Night: Sanchez vs. Riggs | Welterweight | Karo Parisyan def. Drew Fickett | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2006-08-17 | UFC Fight Night 6 | Welterweight | Diego Sanchez def. Karo Parisyan | Decision (unanimous) (29–28, 29–28, 30–26) | 3 | 5:00 |
| 2006-04-15 | UFC 59: Reality Check | Welterweight | Karo Parisyan def. Nick Thompson | TKO (punches) | 1 | 4:44 |
| 2005-06-04 | UFC 53: Heavy Hitters | Welterweight | Karo Parisyan def. Matt Serra | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2005-02-05 | UFC 51: Super Saturday | Welterweight | Karo Parisyan def. Chris Lytle | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2004-08-21 | UFC 49: Unfinished Business | Welterweight | Karo Parisyan def. Nick Diaz | Decision (split) (29–28, 30–27, 28–29) | 3 | 5:00 |
| 2004-01-31 | UFC 46: Supernatural | Welterweight | Georges St-Pierre def. Karo Parisyan | Decision (unanimous) (29–28, 30–27, 30–27) | 3 | 5:00 |
| 2003-09-26 | UFC 44: Undisputed | Welterweight | Karo Parisyan def. Dave Strasser | Submission (kimura) | 1 | 3:52 |