Dennis Olson
UFC DebutNickname“The Menace”
Record
Streak
L4
- Fighting out of
- Amherst, New Hampshire
- Born
- United States
- Camp
- Team Triumph
- Weight class
- Welterweight
- Height
- 6'0" · 183 cm
Before the UFC
Dennis Olson makes their UFC debut
Our striking, grappling, and schedule metrics are measured from UFC fights, so they come online after this bout. Here is the career they bring in — and how live the opposition has been.
Pre-UFC opposition
StrongOpponents' combined record
309-188-3
.622 win rate
Winning-record opponents
17 of 23
carried winning pro records
Pro bouts faced
26
23 opponents with records on file
A descriptive read of the non-UFC slate from opponents’ full career pro records — not a UFC-grade Schedule Score.
UFC fight history
No UFC bouts on record yet.
Outside the UFC
across 26 bouts · 23 promotions · wins by 1 KO · 9 sub · 4 decBellator · BFC · Reality Fighting · Combat Zone 71 · CES MMA 33 +18
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | Aaron Jeffery16-6 | KO/TKO | Corner Stoppage | R2 | 1:43 | Combat Zone 71 | Aug 23, 2019 |
| L | Chuck O'Neil17-9 | Decision | Unanimous | R3 | 5:00 | CES MMA 33 | Mar 11, 2016 |
| L | Brennan Ward17-9 | KO/TKO | Punches | R1 | 4:37 | Bellator | Oct 23, 2015 |
| L | Paul Daley43-18-2 | KO/TKO | Punches | R2 | 1:12 | Bellator | Jul 17, 2015 |
| W | Jarod Lawton | Decision | Split | R3 | 5:00 | NEF | Apr 11, 2015 |
| L | Brett Oteri12-9 | Submission | Kimura | R2 | 2:16 | CES MMA 20 | Dec 6, 2013 |
| W | Todd Chattelle12-12 | Submission | North-South Choke | R1 | 2:45 | CES MMA 16 | Apr 12, 2013 |
| L | John Howard29-19-1 | Decision | Unanimous | R3 | 5:00 | CFA 3 | Oct 9, 2011 |
| W | Submission | Guillotine Choke | R1 | 3:26 | CZ 38 | Jul 29, 2011 | |
| L | Thomas Moreau6-3 | KO/TKO | Punches | R2 | 4:38 | GFL 9 | Sep 17, 2010 |
| L | Rick Hawn21-5 | KO/TKO | Punches | R2 | 2:02 | Triumph Fighter 2 | Jun 5, 2010 |
| L | Dan Cramer11-4 | Decision | Unanimous | R3 | 5:00 | BFC | Apr 22, 2010 |
| W | Nuri Shakir21-22 | Submission | Brabo Choke | R1 | 1:55 | Triumph Fighter 1 | Mar 27, 2010 |
| W | Mike Dolce5-10 | Submission | Guillotine Choke | R3 | 3:17 | NBF | Feb 26, 2010 |
| W | Jon Manley13-6 | Decision | Unanimous | R3 | 5:00 | CZ 30 | Nov 20, 2009 |
| W | Submission | Armbar | R1 | 1:04 | WCF | Sep 26, 2009 | |
| L | David Branch22-7 | Submission | Rear-Naked Choke | R1 | 2:27 | BFC | Jun 12, 2009 |
| W | Jeff Soucie | Submission | Rear-Naked Choke | R2 | 2:07 | CZ 28 | May 8, 2009 |
| W | Mike Littlefield11-8 | Submission | Guillotine Choke | R1 | 0:51 | GFL 2 | Feb 21, 2009 |
| W | Eric Henry10-7 | Decision | Unanimous | R3 | 4:00 | Cage Fight | Nov 8, 2008 |
| W | Todd Solek3-10 | Submission | Armbar | R1 | 0:18 | CZ 26 | Sep 26, 2008 |
| L | Submission | Armbar | R1 | 1:52 | Reality Fighting | May 31, 2008 | |
| W | Todd Chattelle12-12 | Decision | Unanimous | R0 | 0:00 | ICE Fighter | Jul 13, 2007 |
| W | Casey Tierney0-1 | KO/TKO | Punches | R1 | 2:25 | Reality Fighting | Apr 28, 2007 |
| L | Eric Magee3-1 | KO/TKO | Punches | R1 | 0:00 | WFL 11 | Sep 29, 2006 |
| W | Rafael Porto | Submission | Guillotine Choke | R1 | 0:00 | WFL 9 | Aug 25, 2006 |
Non-UFC bouts (regional/other promotions) — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.