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Aaron Simpson
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A-TRAIN

Aaron Simpson

United States flag
United States, Phoenix, Arizona
Power MMA Team
Age: 52
12
Wins
5
Losses
0
DRAWS
@aaronsimpson
Last fight

Loss

Aaron SimpsonAaron Simpson
vs
Mike PierceMike Pierce

KO/TKO (R2 · 0:29)UFC on FX: Browne vs Bigfoot

  • Pro record 12-5-0
  • UFC record 7-4-0
  • Outside the UFC 5-1-0
agentmma.com

Fighter Details

Height:
6'0" (183 cm)
Weight:
170 lbs (77 kg)
Reach:
73" (185 cm)
Stance:
Orthodox
DOB:
20th Jul. 1974
Age:
52
AI Rank:
Unranked

UFC statistics

UFC round data: 11 bouts · through 2012-10-05

3.58
Significant Strikes Landed per Min
53%
Significant Striking Accuracy
2.53
Significant Strikes Absorbed per Min
3.8
Average Takedowns per 15 Min
35%
Takedown Accuracy
0.5
Submission Average per 15 Min
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UFC Record Breakdown

7-4UFC Record
KO/TKO (18%)
Decision (45%)
Losses (36%)

Performance Breakdown

Striking Accuracy53%
Takedown Accuracy35%
Takedown Defense83%

Heuristic ratings

Heuristic scores · 0–100

Fight IQ76/100

11 UFC bouts · 80 division peers

Data through 2012-10-05

Cardio85/100

7 bouts reaching round 3

Data through 2012-07-11

How these scores are calculated

Fight IQ = 40% striking-accuracy percentile + 30% striking-defense percentile + 30% takedown-defense percentile within the division.

Requires 3 UFC bouts, 15 measured minutes, at least 10 division peers, 100 strike attempts, 100 opponent strike attempts and 10 opponent takedown attempts.

Cardio = 100 × the median late/early significant-strike attempt rate ratio, capped at 100. Compare rounds 3+ with rounds 1–2 within each bout. Requires 3 eligible bouts with at least 60 late-round seconds each. 100 means maintained or higher late pace.

Fight IQ summarizes accuracy and defense; cardio summarizes retained pace. Style, opponents and grappling affect both. These scores do not measure intelligence, physical fitness or win probability.

Formula v1

Social Media Growth

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Frequently asked questions

What is Aaron Simpson's professional MMA record?

Aaron Simpson has a professional MMA record of 12-5-0 (wins-losses-draws).

What is Aaron Simpson's UFC record?

Aaron Simpson's UFC record is 7-4-0 (wins-losses-draws), and 5-1-0 in professional fights outside the UFC.

Who does Aaron Simpson fight next?

Aaron Simpson does not have a fight currently scheduled.

How old is Aaron Simpson?

Aaron Simpson is 52 years old, born July 20, 1974.

How tall is Aaron Simpson?

Aaron Simpson stands 183 cm (6'0") tall, with a 185 cm (73") reach.

Where is Aaron Simpson from?

Aaron Simpson is from United States.

What is Aaron Simpson's nickname?

Aaron Simpson is known as "A-Train".

When was Aaron Simpson's last fight?

Aaron Simpson last fought on October 5, 2012 at UFC on FX: Browne vs Bigfoot, losing to Mike Pierce by KO/TKO in round 2.

What were the scorecards for Aaron Simpson vs Kenny Robertson?

Aaron Simpson defeated Kenny Robertson by unanimous decision at UFC on FUEL TV: Munoz vs Weidman on July 11, 2012. The official scorecards were Steve Morrow 30-27, Ray Balewicz 29-28, Dan Stell 29-28 (winner's score first).

What were the scorecards for Aaron Simpson vs Ronny Markes?

Aaron Simpson lost to Ronny Markes by split decision at UFC on FUEL TV: Sanchez vs Ellenberger on February 15, 2012. The official scorecards were Steve Garrean 29-28, Sal D'amato 28-29, Glenn Trowbridge 29-28 (winner's score first).

Aaron Simpson scouting report

Aaron Simpson (United States), a welterweight, went 12-5 as a pro and 7-4 in the UFC (5-1 outside it). He debuted at UFC Fight Night: Condit vs Kampmann on April 1, 2009; two of his seven UFC wins came by KO/TKO and five by decision. Last fight: KO/TKO loss to Mike Pierce, then 6-3 in the UFC, on October 5, 2012 (UFC on FX: Browne vs Bigfoot).

Built from AgentMMA's UFC database (as of November 7, 2026); not AI-written.

Aaron Simpson vs the welterweight average

Computed by AgentMMA from the round-by-round stats of 11 UFC bouts (2:06:43 of fight time).

StatSimpsonDivision averagePercentile
Significant strikes landed per minute3.6454 in 2:06:434.331
Significant strike accuracy52.8%454 of 860 landed48.3%78
Significant strikes absorbed per minute2.5320 in 2:06:433.918
Significant strike defense56.2%410 of 730 avoided54.1%64
Takedowns per 15 minutes3.832 in 2:06:431.494
Takedown accuracy34.8%32 of 92 landed35.2%49
Takedown defense83.3%25 of 30 stopped66.6%85
Submission attempts per 15 minutes0.54 in 2:06:430.469
Knockdowns per 15 minutes0.76 in 2:06:430.584
Control time42.2%53:28 of 2:06:4319.1%86
Average fight time11:3111 bouts10:5368
Height183 cm72″183 cm72.1″
Reach185 cm73″189 cm74.3″
  • Division average and percentile: 80 active welterweight fighters with a UFC bout in the last 3 years, at least 3 UFC bouts and 15 minutes of UFC fight time.
  • Percentile: the share of those fighters whose value is lower (ties count half). For every stat, a higher percentile means a higher number.

Related MMA Lab pages

UFC fight record

UFC record: 7-4

Every UFC bout, newest first. Open a bout for the full result, judges' scorecards and round-by-round stats.

  1. LUFC record after this bout: 7-4-0
    Aaron Simpson
    Aaron Simpson
    vs
    Mike Pierce
    Mike Pierce
    Pro record now: 17-7-0UFC record entering: 6-3-0
    KO/TKOR2 0:29UFC on FX: Browne vs BigfootOct 5, 2012Result & stats
  2. WUFC record after this bout: 7-3-0
    Aaron Simpson
    Aaron Simpson
    vs
    Kenny Robertson
    Kenny Robertson
    Pro record now: 15-5-0UFC record entering: 0-1-0
    DECUFC on FUEL TV: Munoz vs WeidmanJul 11, 2012Result & stats
  3. LUFC record after this bout: 6-3-0
    Aaron Simpson
    Aaron Simpson
    vs
    Ronny Markes
    Ronny Markes
    Pro record now: 17-5-0UFC record entering: 1-0-0
    DECUFC on FUEL TV: Sanchez vs EllenbergerFeb 15, 2012Result & stats
  4. WUFC record after this bout: 6-2-0
    Aaron Simpson
    Aaron Simpson
    vs
    Eric Schafer
    Eric Schafer
    Pro record now: 14-8-2UFC record entering: 3-4-0
    DECUFC 136: Edgar vs Maynard 3Oct 8, 2011Result & stats
  5. WUFC record after this bout: 5-2-0
    Aaron Simpson
    Aaron Simpson
    vs
    Brad Tavares
    Brad Tavares
    Pro record now: 21-13-0UFC record entering: 2-0-0
    DECUFC 132: Cruz vs FaberJul 2, 2011Result & stats
  6. WUFC record after this bout: 4-2-0
    Aaron Simpson
    Aaron Simpson
    vs
    Mario Miranda
    Mario Miranda
    Pro record now: 14-7-0UFC record entering: 1-2-0
    DECUFC Fight Night: Nogueira vs DavisMar 26, 2011Result & stats
  7. LUFC record after this bout: 3-2-0
    Aaron Simpson
    Aaron Simpson
    vs
    Mark Munoz
    Mark Munoz
    Pro record now: 14-6-0UFC record entering: 3-2-0
    DECUFC 123: Rampage vs MachidaNov 20, 2010Result & stats
  8. LUFC record after this bout: 3-1-0
    Aaron Simpson
    Aaron Simpson
    vs
    Chris Leben
    Chris Leben
    Pro record now: 22-11-0UFC record entering: 9-5-0
    KO/TKOR2 4:17The Ultimate Fighter: Team Liddell vs Team Ortiz FinaleJun 19, 2010Result & stats
  9. WUFC record after this bout: 3-0-0
    Aaron Simpson
    Aaron Simpson
    vs
    Tom Lawlor
    Tom Lawlor
    Pro record now: 10-6-0 (1 NC)UFC record entering: 2-0-0
    DECUFC Fight Night: Maynard vs DiazJan 11, 2010Result & stats
  10. WUFC record after this bout: 2-0-0
    Aaron Simpson
    Aaron Simpson
    vs
    Ed Herman
    Ed Herman
    Pro record now: 27-16-0 (1 NC)UFC record entering: 4-4-0
    KO/TKOR2 0:17UFC 102: Couture vs NogueiraAug 29, 2009Result & stats
  11. WUFC record after this bout: 1-0-0
    Aaron Simpson
    Aaron Simpson
    vs
    Tim McKenzie
    Tim McKenzie
    Pro record now: 14-9-0UFC record entering: 0-0-0
    KO/TKOR1 1:40UFC Fight Night: Condit vs KampmannApr 1, 2009Result & stats

Next for Aaron Simpson

Last fightAaron Simpson vs Mike PierceHead-to-head breakdown and verified fight statsDivisionUFC Welterweight rankingsChampion, top 15 and professional MMA records
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