Jason "Dooms" Day
| First Name : | Jason |
| Last name : | Day |
| Nickname : | Dooms |
| Height : | 6'0" (183cm) |
| Weight : | 185 lbs (84 kg) |
| City : | Lethbridge, Alberta |
| Country : | Canada |
| Record : | 6 - 3 - 0 (Wins - Losses - Draws) |
| Wins : |
3 Submission (Guillotine Choke) (50%) 1 Decision (Split) (16.67%) 1 TKO (16.67%) 1 TKO (Punches) (16.67%) |
| Losses : |
1 TKO (Punches) (33.33%) 1 Submission (Armbar) (33.33%) 1 KO (33.33%) |
| Association : | Canadian Martial Arts Centre |
| Match Stats | ||||||
| Result | Opponent | Method | Event Title | Date | Round | Time |
| Lost | Michael Bisping | TKO (Punches) | UFC 85 - Bedlam | Jun 7, 2008 | 1 | 3:42 Sec |
| Win | Alan Belcher | TKO (Punches) | UFC 83 - Serra vs. St. Pierre II | Apr 19, 2008 | 1 | 3:58 Sec |
| Win | David Loiseau | Decision (Split) | HCF - Destiny | Feb 1, 2008 | 3 | 5:00 Sec |
| Win | Ricardeau Francois | Submission (Guillotine Choke) | KOTC - Amplified | Nov 26, 2006 | 1 | 1:21 Sec |
| Win | Greg Rogalsky | Submission (Guillotine Choke) | KOTC - Conquest | Dec 3, 2005 | 1 | 2:22 Sec |
| Lost | Ulysses Castro | KO | WFF 6 - World Freestyle Fighting 6 | May 14, 2004 | 1 | 2:22 Sec |
| Lost | Derek Tisdale | Submission (Armbar) | WFC - Western Freestyle Championships | Oct 12, 2003 | 1 | |
| Win | Jason Segal | TKO | RR 6 - Roadhouse Rumble 6 | Oct 5, 2002 | 1 | |
| Win | Jeremiah Cram | Submission (Guillotine Choke) | BTB - Border Town Brawl | Jul 27, 2002 | 2 | |