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UFC on FX: Browne vs Bigfoot
Mike Pierce
Mike Pierce
14-5 · USA
VS
Aaron Simpson
Aaron Simpson
12-3 · USA
October 5, 2012 · Minneapolis, Minnesota, USA
Welterweight · 3 rounds
171.0lb
Weigh-in
171.0lb
Mike Pierce def. Aaron Simpson by KO/TKO (Punch), R2 0:29
Performance
Round by round
SSTDKDCtrl
R1
Pierce5/140/201:07
Simpson27/391/110:46
R2 · 0:29
Pierce5/70/010:02
Simpson1/50/000:00
Total
Pierce10/210/211:09
Simpson28/441/110:46

Pre-fight

The model's read going in

The walk-forward model's call at the time of the bout — persisted out-of-sample, with no hindsight about the result.

Prediction
PierceWin probabilitySimpson
47.8%52.2%
KO / TKO
23%
Submission
28%
Decision
49%
Expected fight time: 9.9 min
What drives the pick

Each bar is a feature's push on the model from the center axis. Red pushes toward Pierce, blue toward Simpson. Tap a bar for why.

Predicted outcomes
Pierce48%
Wins by
Model
Equity
Mkt
KO / TKO10%22%
Submission14%29%
Decision24%49%
Predicted output
Sig. strikes28 (1537)act 10
Takedowns0.7 (0.02.5)act 0
Simpson52%
Wins by
Model
Equity
Mkt
KO / TKO13%25%
Submission14%26%
Decision25%49%
Predicted output
Sig. strikes28 (1536)act 28
Takedowns0.7 (0.02.4)act 1
Combined totals~56 sig strikes~1.5 takedownsmkt —
How it ends
mkt —
R133%
R29%
R39%
Distance49%
Fighter props
Most sig. strikestie 1.9%
Pierce
50.1%-105
Simpson
+10547.9%
Most takedownstie 30.8%
Pierce
34.8%-101
Simpson
+10134.4%
Significant strikes — over/under
Pierce
Expected: 28.3
28.5
Over 28.5
42.0%
+138
Under 28.5
58.0%
-138
03671
Simpson
Expected: 27.6
27.5
Over 27.5
42.8%
+134
Under 27.5
57.2%
-134
03570
Takedowns — over/under
Pierce
Expected: 0.7
0.5
Over 0.5
53.3%
-114
Under 0.5
46.7%
+114
035
Simpson
Expected: 0.7
0.5
Over 0.5
53.7%
-116
Under 0.5
46.3%
+116
035

Odds are model-implied (no real prop market is priced for these). The “most” prices are draw-no-bet — a tie (for takedowns, usually 0–0) is a push, so each side is priced off its chance of winning given a result, while the % shown is the raw chance of landing strictly more. Drag a line in half-point steps: a half line (e.g. 2.5) is a clean over/under, while a whole number adds a third outcome — landing exactly on it, a push — so over, exact and under sum to 100%. On a whole number the over/under odds are draw-no-bet (priced off the decisive mass, since the push refunds), so the two sides stay mirror images rather than implying an arbitrage.

Expected fight time 9.9 min. Predicted-output ranges are percentiles of the model’s simulated fights: sig strikes the middle 50% (25th–75th); takedowns the wider 10th–90th, since they’re 0 in most fights so a narrow band would collapse to 0. Win-by-method = win probability × that fighter’s own method split: the model forecasts how the fight ends, and that forecast is divided between the corners by each fighter’s finishing record — UFC wins in full, earlier-career wins at half weight, as of fight night — reconciled so the fighters’ totals still equal their win probabilities and the methods still total the fight-level forecast above. “Equity” is each of those over that fighter’s win % — how they win given that they win — so a column adds to 100%, and it differs by corner. A fighter with no classifiable wins at any level leans on the fight-level split. “How it ends” is the model’s round-of-finish split. “Mkt” is the de-vigged market prop (consensus across books), shown for context, not as a betting signal; rounds & totals slots fill as that data lands. Percentages are apportioned by largest remainder, so each set adds to its total exactly and an individual figure can sit a point off its own rounding.

Model vs market
Final
ModelMarketGapLine
To win
Pierce47.8%58.2%−10.4-145
Simpson52.2%41.8%+10.4+135

Market % is the de-vigged (no-vig) consensus across the books that price both fighters; the line is the average across books with the min–max range in parentheses. Gap is the model minus the market in points (+ = the model rates that outcome above the market). Thin or one-sided markets are flagged or left blank rather than shown as a fabricated %. Shown for context, not as a bet — the closing line is the sharpest public price and the model trails it on average. For 5-round bouts the model splits its round-3+ finish mass into rounds 3–5 by the historical within-bucket rate, so the over-3.5 / 4.5 lines carry a model estimate.

Trait web
69.4Striking71.3
Simpson +1.8
59.0Grappling62.1
Simpson +3.1
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
PierceSimpson
Tale of the tape
Ratings (Elo)
1572
Pound-for-pound
1574
1572
Divisional
1534
1474
Striking offense
1494
1528
Striking defense
1519
1519
Grappling offense
1524
1527
Grappling defense
1519
Physical
32 yrs
Age
38 yrs
5'8"
Height
6'0"
71"
Reach
73"
Orthodox
Stance
Orthodox
Striking (UFC career)
2.87
Strikes landed / min
3.51
44%
Strike accuracy
52%
2.15
Strikes absorbed / min
2.56
62%
Strike defense
56%
Grappling (UFC career)
2.91
Takedowns / 15 min
3.84
45%
Takedown accuracy
34%
70%
Takedown defense
82%
0.4
Sub attempts / 15 min
0.4
Form & résumé
67%
UFC win rate
70%
+1
Win/loss streak
+1
60%
Last-5 win rate
80%
33%
Finish rate
29%
Recent opp. quality
119
Days since last fight
86
Recent form (last 5 UFC)
Mike Pierce
  • WCarlos Eduardo RochaU-DEC R3
    Close -2304mo before
  • LJosh KoscheckS-DEC R3
    Close +2488mo before
  • WPaul BradleyS-DEC R3
    Close -30011mo before
  • LJohny HendricksS-DEC R3
    Close +1321y 2mo before
  • WKenny RobertsonKO/TKO R2
    missedClose -2401y 8mo before
Aaron Simpson
  • WKenny RobertsonU-DEC R3
    Close -3303mo before
  • LRonny MarkesS-DEC R3
    Close +1308mo before
  • WEric SchaferU-DEC R3
    Close -4001y before
  • WBrad TavaresU-DEC R3
    Close -2451y 3mo before
  • WMario MirandaU-DEC R3
    Close -2101y 6mo before
Pierce — win / loss by method
Record: 14-5-0

Bar length is fight count (largest bar = full width); shading splits finishes by round and decisions by unanimous vs split — tap a bar for the round-by-round count.

KO/TKO
6 wins, 0 losses
W
43% of wins
L
0% of losses
Submission
1 win, 0 losses
W
7% of wins
L
0% of losses
Decision
7 wins, 5 losses
W
50% of wins
L
100% of losses
UFC
6win3loss0draw0NC
WinsLosses
1 (17%)KO/TKO(0%) 0
1 (17%)Submission(0%) 0
4 (67%)Decision(100%) 3
Non-UFC
8win2loss0draw0NC
WinsLosses
5 (63%)KO/TKO(0%) 0
0 (0%)Submission(0%) 0
3 (38%)Decision(100%) 2
Simpson — win / loss by method
Record: 12-3-0

Bar length is fight count (largest bar = full width); shading splits finishes by round and decisions by unanimous vs split — tap a bar for the round-by-round count.

KO/TKO
6 wins, 1 loss
W
50% of wins
L
33% of losses
Submission
1 win, 0 losses
W
8% of wins
L
0% of losses
Decision
5 wins, 2 losses
W
42% of wins
L
67% of losses
UFC
7win3loss0draw0NC
WinsLosses
2 (29%)KO/TKO(33%) 1
0 (0%)Submission(0%) 0
5 (71%)Decision(67%) 2
Non-UFC
5win0loss0draw0NC
WinsLosses
4 (80%)KO/TKO() 0
1 (20%)Submission() 0
0 (0%)Decision() 0

Profiles

Experience
Pierce
Simpson
9
UFC fights
10
123.7 min · 13.7 avg
Octagon time
121.2 min · 12.1 avg
19y 2m
Career length
26y 3m
UFC schedule strength

Opponents' records on fight night — toggle their full cross-promotional record vs UFC bouts only.

Pierce
Simpson
142W–18L · 88.8%
Overall
114W–31L · 78.6%
95W–9L · 91.3%
Wins
75W–21L · 78.1%
47W–9L · 83.9%
Losses
39W–10L · 79.6%
Non-UFC schedule strength
Pierce
Simpson
70W–40L · 63.6%
Overall
3W–0L · 100.0%
65W–40L · 61.9%
Wins
3W–0L · 100.0%
5W–0L · 100.0%
Losses
0W–0L
Distance striking
Pierce
Simpson
3.82
Landed / min
4.03
30.4%
Accuracy
35.5%
69.7%
Defense
68.6%
0.12
Knockdowns / 15 min
0.62
33.2%
Time at distance
31.5%
Grappling & control
Pierce
Simpson
2.91
Takedowns / 15 min
3.84
45.3%
Takedown accuracy
34.1%
69.6%
Takedown defense
82.1%
0.36
Sub attempts / 15 min
0.37
84.7%
Control share
77.7%
Strike target map
Pierce
  • Head60%(214)div 62%
  • Body20%(71)div 22%
  • Legs20%(70)div 16%
Simpson
  • Head54%(230)div 62%
  • Body22%(93)div 22%
  • Legs24%(103)div 16%

Where each fighter lands significant strikes (career). “div” = the weight-class average.

Mike Pierce
CloseSSTDKDCtrl

Per-fight: SS & TD shown landed/attempted; Close = consensus closing line.

Aaron Simpson
CloseSSTDKDCtrl

Per-fight: SS & TD shown landed/attempted; Close = consensus closing line.