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Welterweight MMA · most active 2010s

Aaron Simpson

73″ reach · +1.37% reach advantage · 22nd percentile

MMA record

12–5

Aaron Simpson has a reach of 73″ against a height of 72″ — a reach advantage of +1.37%, unusually short for welterweight MMA and the 22nd percentile of the 174 compared here.

20002010win v Billy Onlewski, 2000, submissionwin v Tim Coulson, 2007, kowin v David Avellan, 2008, kowin v Travis Degraw, 2008, kowin v Scott Dingman, 2008, kowin v Ed Herman, 2009, kowin v Tim McKenzie, 2009, koloss v Mark Muñoz, 2010, decisionloss v Chris Leben, 2010, kowin v Tom Lawlor, 2010, decisionwin v Eric Schafer, 2011, decisionwin v Brad Tavares, 2011, decisionwin v Mario Miranda, 2011, decisionloss v Mike Pierce, 2012, kowin v Kenny Robertson, 2012, decisionloss v Ronny Markes, 2012, decisionloss v Joshua Burkman, 2013, ko
WON ABOVE·LOST BELOW BAR = STOPPAGE·BROKEN BAR = SUBMISSION·TICK = DECISION 2000–2013

SOURCE·Aaron Simpson (fighter) — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-03-15

How this record is compiled

  1. Measurements come from the fighter's English Wikipedia infobox; the bout list is parsed from the results table on the same article, read on 2026-03-15. Boxing tables are read by header name and MMA records by the fixed column order of the MMA record template — two different parsers, because reading MMA rows as a boxing table returns a fighter's boxing record in place of their real one.
  2. A bout enters the ledger with whatever fields the source states: result, opponent, method, round, year. Any field the source leaves empty stays empty here. A date that cannot be established is left blank rather than inferred, and the bout is still counted.
  3. A no contest is counted and printed as a no contest. It is never folded into the wins, the losses or the draws, and it never disappears to make a total balance.
  4. Where the article's infobox total disagrees with its own results table, both figures are published and each is labelled with where it came from. Nothing is averaged and nothing is reconciled against a second database.
  5. Percentiles rank this fighter among the 174 welterweight MMA fighters in the dataset — the most specific group of at least 30 that this fighter belongs to.
reach advantage = (reach − height) ÷ height × 100

Sources, exclusions and known limits →

Bout record

Every bout the article's own results table lists, in order. A dash is a field the source leaves empty — it is not a zero and it is not a guess.

Bout-by-bout recordAUG 2026
YearResultOpponentMethodRd
2013 L Joshua Burkman KO/TKO1
2012 L Mike Pierce KO/TKO2
2012 W Kenny Robertson Decision3
2012 L Ronny Markes Decision3
2011 W Eric Schafer Decision3
2011 W Brad Tavares Decision3
2011 W Mario Miranda Decision3
2010 L Mark Muñoz Decision3
2010 L Chris Leben KO/TKO2
2010 W Tom Lawlor Decision3
2009 W Ed Herman KO/TKO2
2009 W Tim McKenzie KO/TKO1
2008 W David Avellan KO/TKO1
2008 W Travis Degraw KO/TKO3
2008 W Scott Dingman KO/TKO1
2007 W Tim Coulson KO/TKO1
2000 W Billy Onlewski Submission1

9 of these opponents have their own page here.

SOURCE·Aaron Simpson (fighter) — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-03-15

Reach in context

Reach advantage

+1.37%

73″ reach on a 72″ frame

Compared against 174 welterweight MMA fighters. Median 2.79%.

-2.7%welterweight MMA reach advantage8.6%
Measurements
Reach73″ (185.4 cm)42nd pct
Height72″ (182.9 cm)62nd pct
StanceOrthodox
DivisionWelterweight MMA
competed at 2: middleweight, welterweight — compared here against the last
Most active decade2010s — 10 of 17 dated bouts
CountryUnited States

Record

MMA record

12–5

17 bouts on record

Finish rate

58%

of wins ended inside the distance — welterweight MMA median 73%, 22nd percentile

KO/TKO: 6 (50%)Submission: 1 (8%)Decision: 5 (42%)
  • KO/TKO 50%
  • Submission 8%
  • Decision 42%

The career, bout by bout

17 recorded bouts from 2000 to 2013. Every incumbent shows this as a table you have to read; here it is as a shape you can see.

2000 2010 win vs Billy Onlewski (2000)win vs Tim Coulson (2007)win vs David Avellan (2008)win vs Travis Degraw (2008)win vs Scott Dingman (2008)win vs Ed Herman (2009)win vs Tim McKenzie (2009)loss vs Mark Muñoz (2010)loss vs Chris Leben (2010)win vs Tom Lawlor (2010)win vs Eric Schafer (2011)win vs Brad Tavares (2011)win vs Mario Miranda (2011)loss vs Mike Pierce (2012)win vs Kenny Robertson (2012)loss vs Ronny Markes (2012)loss vs Joshua Burkman (2013)
winlossdraw / NC2000–2013

Career span

14y

2000–2013

Longest unbeaten run

7

without a loss — draws do not break it

Busiest year

2008

3 bouts

Recorded bouts

17

17 with a date

Standing questions

What this record does and does not say

What is Aaron Simpson's record?
12–5 in MMA. That is the aggregate stated in the English Wikipedia infobox; the results table on the same article lists 17 bouts individually.
Does a no contest change a record here?
No. A no contest is not a win, a loss or a draw, and it is never folded into one. It is counted and printed separately, so a 20–0 record with two no contests is shown as exactly that rather than as 22–0 or as 20–0 with the no contests dropped. The same applies to a bout overturned after the fact where the source records the change.
What happens when sources disagree about a fight?
This site publishes one source — the fighter's English Wikipedia article, read on the date printed under every table — and it does not silently reconcile that against anyone else's database. Where the article's own infobox total and its own results table disagree, both are shown and the page says which one each figure came from. Nothing is averaged, and no field is filled in from a second source to make a total balance.

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Amit Sharma

Auckland real-estate agent and marketer. Builds free, sourced data tools.