Jake O'Brien
15–4 · 19 recorded bouts · 2005–2012
Jake O'Brien finished 67% of 15 wins inside the distance — the 19th percentile for heavyweight MMA, where the median is 85%. No reach is on record, so this page compares record rather than measurements.
What is on record
| Reach | not recorded | |
|---|---|---|
| Height | 75″ (190.5 cm) | |
| Stance | — | |
| Division | Heavyweight MMA competed at 2: light heavyweight, heavyweight — compared here against the last | |
| Peak era | 2010s | |
| Country | United States |
Wikipedia carries no reach figure for Jake O'Brien, so the reach-advantage comparison this site is built on cannot be computed. Everything below comes from the record instead.
Record
MMA record
15–4
19 bouts on record
Finish rate
67%
of wins ended inside the distance — heavyweight MMA median 85%, 19th percentile
The career, bout by bout
19 recorded bouts from 2005 to 2012. Every incumbent shows this as a table you have to read; here it is as a shape you can see.
Career span
8y
2005–2012
Longest unbeaten run
10
without a loss — draws do not break it
Busiest year
2006
7 bouts
Recorded bouts
19
19 with a date
Fights
| Year | Result | Opponent | Method | Rd |
|---|---|---|---|---|
| 2012 | W | Miodrag Petkovic | Decision | 3 |
| 2012 | W | James Shaw | Submission | 1 |
| 2010 | L | Gegard Mousasi | Submission | 1 |
| 2010 | W | Toni Valtonen | Decision | 3 |
| 2010 | W | Dave Hess | Submission | 2 |
| 2009 | L | Jon Jones | Submission | 2 |
| 2009 | W | Christian Wellisch | Decision | 3 |
| 2008 | L | Cain Velasquez | KO/TKO | 1 |
| 2008 | L | Andrei Arlovski | KO/TKO | 2 |
| 2007 | W | Heath Herring | Decision | 3 |
| 2006 | W | Josh Schockman | Decision | 3 |
| 2006 | W | Kristof Midoux | KO/TKO | 2 |
| 2006 | W | Pat Harmon | Submission | 1 |
| 2006 | W | Antoine Hayes | KO/TKO | 1 |
| 2006 | W | Jay White | KO/TKO | 1 |
| 2006 | W | Johnathan Ivey | KO/TKO | 1 |
| 2006 | W | Anthony Ferguson | KO/TKO | 1 |
| 2005 | W | Paul Bowers | KO/TKO | 1 |
| 2005 | W | Chris Clark | KO/TKO | 1 |
6 of these opponents have their own page here.
How this is worked out
- Measurements and records are read from the fighter's English Wikipedia infobox; the fight list is parsed from the article's own results table.
- Reach advantage is (reach − height) ÷ height as a percentage, so fighters of different sizes compare directly.
- Percentiles rank this fighter among the 324 heavyweight MMA fighters in the dataset — chosen because it is the most specific group of at least 30 that this fighter belongs to.
Reach advantage = (reach − height) ÷ height × 100
Source: Jake O'Brien (fighter) on English Wikipedia (CC BY-SA 4.0), as of 2026-02-17. Percentiles and derived figures computed here.