// Roster Index›Welterweight›Dossier · Aaron Simpson
UFC FIGHTER PROFILE_
UFC · UNKNOWNWELTERWEIGHT

Aaron
Simpson

NICKNAME"A-Train"·UNITED STATES
PROFESSIONAL RECORD
12-5-0
CURRENT FORM
2L STREAK
NEXT FIGHT
NO BOUT ANNOUNCED
Aaron Simpson
FIGHTER -
UNI🇺🇸
PROFILE PHOTO
PROFILE
PROFILE DATA! COLD
HEIGHT
6'0"
REACH
6'1"
AGE
52
STANCE
ORTHODOX
WEIGHT
Welterweight
PROFESSIONAL RECORD_
17 BOUTS
WIN
12
LOSS
5
DRAW
0
WIN RATE
71%
12/17 bouts
FINISH RATE
58%
of professional wins
LAST 5 FIGHTS2L STREAK · 2-3
WLWLL
STYLE SUMMARY_
DATA: COLD
FIGHTING STYLE
WELL ROUNDED

Well rounded fighter built around defensive grappling — 50% of wins are by ko/tko.

KEY STRENGTHS

Closes distance and trades — most wins come from heavy hands inside the first two rounds.

KEY RISKS

Pressure boxers willing to wade into the pocket have found chins on offer; cardio drops in late rounds.

// PERFORMANCE_METRICS · 02_

STRIKE / GRAPPLE
VITALS

Observed profile rates compared with stored weight-class medians where coverage exists. Any fallback uses a labeled UFC reference average; no fallback is presented as a division median.

// SLPM▲ ABOVE
3.60
Strikes Landed/Min
Reference value 2.65
// STR. ACC▲ ABOVE
52%
Striking Accuracy
Reference value 47%
// SAPM▲ ABOVE
2.53
Strikes Absorbed/Min
Reference value 2.74
// STR. DEF▲ ABOVE
56%
Striking Defense
Reference value 53%
// TD AVG▲ ABOVE
3.78
Takedowns/15 min
Reference value 1.50
// TD ACC▼ BELOW
34%
Takedown Accuracy
Reference value 40%
// TD DEF▲ ABOVE
83%
Takedown Defense
Reference value 59%
// SUB AVG▼ BELOW
0.50
Submissions/15 min
Reference value 0.50
// QUALITY_OF_COMPETITION · 02B_

WHO THEY
ACTUALLY FOUGHT

A record says how often a fighter won, not against whom. These ratings weigh every result by the opponent's strength at the time, then compare this fighter with the 99 rated fighters on the UFC welterweight roster (anyone with a UFC bout in the last two years or one booked).

// RATING
#56
against the 99 rated on the UFC welterweight roster · Elo 1546
// STRENGTH OF SCHEDULE
46th
percentile · average opponent rated 1555 at fight time (recent fights count most)
// RESULTS VS EXPECTATION
43rd
percentile · fell short of what opponents' ratings predicted (-0.01 per fight)

13 rated fights · opponents rated in 76% of recorded fights · last rated fight MAR 23, 2013

// CAREER_BREAKDOWN · 03_

WIN CONDITION MAP

Where the wins come from, and where the losses came from. Method splits by knockout, submission, and decision.

// WINS (12)
n = 12
KO/TKO · 6
SUB · 1
DEC · 5
6
KO/TKO
50%
1
SUB
8%
5
DEC
42%
// LOSSES (5)
n = 5
KO/TKO · 3
DEC · 2
3
KO/TKO
60%
0
SUB
0%
2
DEC
40%
// PATH_TO_VICTORY_
58% FINISH
KO/TKOEARLY ROUNDS · 6 fights
50%
SUBANY ROUND · 1 fights
8%
DECFULL FIGHT · 5 fights
42%
Top win condition: ko/tko · early rounds.
// DNA_PROFILE · 04_

ATTRIBUTE FINGERPRINT

Evidence-backed 0-100 scores built only from observed profile stats and disclosed bout-history proxies. This is a fixed Blueprint scoring model, not a division percentile; missing axes remain unknown.

// DNA_PROFILE_
3 OBSERVED7 DERIVED0 UNKNOWN
// BENCHMARK
FIXED SCORE SCALE
// LINKED SAMPLE
17 BOUTS
// PROFILE UPDATED
JUN 28, 2026
// RECORDED SOURCE
ufcstats
Fighter attribute fingerprint10 of 10 attributes have evidence-backed scores on the Blueprint fixed scale. Unknown axes are not plotted and no score represents a division percentile.KO POWER71TD DEFENSE96GRAPPLING58CHIN67STRIKING57CARDIO76AGGRESSION58SUB THREAT25STR DEFENSE58RECOVERY50
// BANDS
90+ELITE
70-89STRONG
45-69AVERAGE
30-44BELOW
<30LOW
N/AUNKNOWN
Highest scored axis: TD Defense. Lowest scored axis: Sub Threat.
// EVIDENCE REGISTER
10 SCORED · 0 OPEN
KO Power71
DERIVED PROXY

KO wins divided by total career wins

N=12 wins
TD Defense96
OBSERVED INPUT

Observed takedown defense rate (83%)

Grappling58
DERIVED PROXY

Composite of observed takedown volume, accuracy, and submission rate

Chin67
DERIVED PROXY

KO-loss durability proxy from career record

N=17 bouts
Striking57
DERIVED PROXY

Composite of observed striking volume and accuracy

Cardio76
DERIVED PROXY

Long-fight exposure proxy from bout duration and decision-win share

Aggression58
DERIVED PROXY

Activity proxy from observed strike and takedown volume

Sub Threat25
OBSERVED INPUT

Observed submission rate (0.5 per 15 min)

Str Defense58
OBSERVED INPUT

Observed striking defense rate (56%)

Recovery50
DERIVED PROXY

Share of recorded losses followed by a win in the next recorded bout.

N=5 losses
Fighter attribute fingerprint accessible data summary
AttributeScoreProvenanceEvidenceSample
KO Power71 out of 100DERIVED PROXYKO wins divided by total career wins12 wins
TD Defense96 out of 100OBSERVED INPUTObserved takedown defense rate (83%)Not recorded
Grappling58 out of 100DERIVED PROXYComposite of observed takedown volume, accuracy, and submission rateNot recorded
Chin67 out of 100DERIVED PROXYKO-loss durability proxy from career record17 bouts
Striking57 out of 100DERIVED PROXYComposite of observed striking volume and accuracyNot recorded
Cardio76 out of 100DERIVED PROXYLong-fight exposure proxy from bout duration and decision-win shareNot recorded
Aggression58 out of 100DERIVED PROXYActivity proxy from observed strike and takedown volumeNot recorded
Sub Threat25 out of 100OBSERVED INPUTObserved submission rate (0.5 per 15 min)Not recorded
Str Defense58 out of 100OBSERVED INPUTObserved striking defense rate (56%)Not recorded
Recovery50 out of 100DERIVED PROXYShare of recorded losses followed by a win in the next recorded bout.5 losses
// CAREER_MOMENTUM · 05_

THE ARC SO FAR

Rolling momentum score (0-100) recomputed after every bout. Weighted blend of result, opponent context, and method-of-finish, designed to show the shape, not the destination.

// MOMENTUM_TIMELINE_
SCOREWINLOSS
0255075100APR 2000WAPR 2000WOCT 2007WFEB 2008WMAY 2008WNOV 2008WAPR 2009WAUG 2009WJAN 2010LJUN 2010LNOV 2010WMAR 2011WJUL 2011WOCT 2011LFEB 2012WJUL 2012LOCT 2012LMAR 2013// SCORE

  1. Start, APR 2000, momentum score 45.
  2. Start, APR 2000, momentum score 55, SUB R1.
  3. Start, OCT 2007, momentum score 65, KO/TKO R1.
  4. Start, FEB 2008, momentum score 76, KO/TKO R1.
  5. Start, MAY 2008, momentum score 85, KO/TKO R3.
  6. Start, NOV 2008, momentum score 95, KO/TKO R1.
  7. Start, APR 2009, momentum score 100, KO/TKO R1.
  8. Start, AUG 2009, momentum score 100, KO/TKO R2.
  9. Start, JAN 2010, momentum score 100, DEC R3.
  10. Start, JUN 2010, momentum score 93, KO/TKO R2.
  11. Start, NOV 2010, momentum score 86, DEC R3.
  12. Start, MAR 2011, momentum score 93, DEC R3.
  13. Start, JUL 2011, momentum score 100, DEC R3.
  14. Start, OCT 2011, momentum score 100, DEC R3.
  15. Start, FEB 2012, momentum score 93, DEC R3.
  16. Start, JUL 2012, momentum score 100, DEC R3.
  17. Start, OCT 2012, momentum score 93, KO/TKO R2.
  18. Start, MAR 2013, momentum score 83, KO/TKO R1.

Peaked at 100 (W vs McKenzie), bottomed at 45 (Debut). Current reading: 83.

// KILL_SHOT_MATRIX · 06_

WHEN THE FINISHES COME

Cross-tab of fight outcome by method and round. Reads top-down for method, left-right for round. Cyan intensity scales with frequency.

// METHOD × ROUND_
17/17 fights mapped
METHOD ↓ / ROUND →R1R2R3R4R5FREQ
KO/TKO
5
29%
3
18%
1
6%
-
-
9
total
SUB
1
6%
-
-
-
-
1
total
DEC
-
-
7
41%
-
-
7
total
// PRIMARY KILL ZONE
R1-R2 KO/TKO · 8 of 17 mapped
// LATE-FIGHT GAP
No R5 finishes either way
// DECISION RATE
41%, fights often go the distance
// FIGHT_HISTORY · 08_

BOUT LOG
17 FIGHTS

Detailed bout records for the indexed tenure. Sorted most recent first.

L
VS Joshua BurkmanMar 23, 2013
KO/TKOR1 · 3:04
WSOF 2 - Arlovski vs. Johnson
SECONDARY DETAILS
METHOD
DETAIL
TKO (Knee and Punches)
L
VS Mike PierceOct 5, 2012
KO/TKOR2 · 0:29
UFC on FX 5 - Browne vs. Bigfoot
SECONDARY DETAILS
METHOD
DETAIL
KO (Punches)
W
VS Kenny RobertsonJul 11, 2012
DecisionR3 · 5:00
UFC on Fuel TV 4 - Munoz vs. Weidman
SECONDARY DETAILS
METHOD
DETAIL
Decision (Unanimous)
L
VS Ronny MarkesFeb 15, 2012
DecisionR3 · 5:00
UFC on Fuel TV 1 - Sanchez vs. Ellenberger
SECONDARY DETAILS
METHOD
DETAIL
Decision (Split)
W
VS Eric SchaferOct 8, 2011
DecisionR3 · 5:00
UFC 136 - Edgar vs. Maynard 3
SECONDARY DETAILS
METHOD
DETAIL
Decision (Unanimous)
W
VS Brad TavaresJul 2, 2011
DecisionR3 · 5:00
UFC 132 - Cruz vs. Faber 2
SECONDARY DETAILS
METHOD
DETAIL
Decision (Unanimous)
W
VS Mario MirandaMar 26, 2011
DecisionR3 · 5:00
UFC Fight Night 24 - Nogueira vs. Davis
SECONDARY DETAILS
METHOD
DETAIL
Decision (Unanimous)
L
VS Mark MunozNov 20, 2010
DecisionR3 · 5:00
UFC 123 - Rampage vs. Machida
SECONDARY DETAILS
METHOD
DETAIL
Decision (Unanimous)
L
VS Chris LebenJun 19, 2010
KO/TKOR2 · 4:17
UFC - The Ultimate Fighter 11 Finale
SECONDARY DETAILS
METHOD
DETAIL
TKO (Punches)
W
VS Tom LawlorJan 11, 2010
DecisionR3 · 5:00
UFC Fight Night 20 - Maynard vs. Diaz
SECONDARY DETAILS
METHOD
DETAIL
Decision (Split)
W
VS Ed HermanAug 29, 2009
KO/TKOR2 · 0:17
UFC 102 - Couture vs. Nogueira
SECONDARY DETAILS
METHOD
DETAIL
TKO (Knee Injury)
W
VS Tim McKenzieApr 1, 2009
KO/TKOR1 · 1:40
UFC Fight Night 18 - Condit vs. Kampmann
SECONDARY DETAILS
METHOD
DETAIL
TKO (Punches)
// FAQ · 09_

CITATION-READY ANSWERS

Quick answers based on the public fighter profile and fight history shown on this page.

Welterweight. Professional record 12-5. Unranked at the time of indexing.

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// LAST INDEX SYNC · 2026-10-28