Casey "The Underdog" Olson
| First Name : | Casey |
| Last name : | Olson |
| Nickname : | The Underdog |
| Height : | 6'0" (183cm) |
| Weight : | 145 lbs (66 kg) |
| City : | Fresno, California |
| Country : | United States |
| Style : | Wrestling |
| Record : | 7 - 2 - 0 (Wins - Losses - Draws) |
| Wins : |
3 TKO (Punches) (42.86%) 1 Submission (Rear Naked Choke) (14.29%) 1 Submission (Guillotine Choke) (14.29%) 2 Decision (Unanimous) (28.57%) |
| Losses : |
1 Submission (Guillotine Choke) (50%) 1 Decision (Split) (50%) |
| Match Stats | ||||||
| Result | Opponent | Method | Event Title | Date | Round | Time |
| Win | Chris Culley | TKO (Punches) | Strikeforce - Challengers Series 4 | Nov 6, 2009 | 1 | 2:32 Sec |
| Lost | Eddie Yagin | Submission (Guillotine Choke) | PFC 13 - Validation | May 8, 2009 | 1 | 1:16 Sec |
| Win | Sergio Quinones | Submission (Rear Naked Choke) | PFC 8 - A Night of Champions | May 8, 2008 | 1 | 0:46 Sec |
| Win | Scott Brommage | TKO (Punches) | PFC 6 - No Retreat, No Surrender | Jan 17, 2008 | 1 | 1:48 Sec |
| Lost | Isaiah Hill | Decision (Split) | WC 2 - Warrior Cup 2 | Apr 7, 2007 | 3 | 5:00 Sec |
| Win | Bobby Sanchez | Submission (Guillotine Choke) | Strikeforce - Tank vs. Buentello | Oct 7, 2006 | 1 | 1:58 Sec |
| Win | Chris Solomon | Decision (Unanimous) | WEC 23 - Hot August Fights | Aug 17, 2006 | 3 | 5:00 Sec |
| Win | Joe Martin | Decision (Unanimous) | WEC 18 - Unfinished Business | Jan 13, 2006 | 3 | 5:00 Sec |
| Win | Rolland Parli | TKO (Punches) | WEC 16 - Clash of the Titans 2 | Aug 18, 2005 | 1 | 4:58 Sec |