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UFC on FX: Browne vs Bigfoot
Jacob Volkmann
Jacob Volkmann
14-3 · USA
VS
Shane Roller
Shane Roller
11-6 · USA
October 5, 2012 · Minneapolis, Minnesota, USA
Lightweight · 3 rounds
155.0lb
Weigh-in
156.0lb
Jacob Volkmann def. Shane Roller by SUB (Rear Naked Choke), R1 2:38
Performance
Round by round
SSTDKDCtrl
R1 · 2:38
Volkmann8/251/401:23
Roller0/70/000:00
Total
Volkmann8/251/401:23
Roller0/70/000:00

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
VolkmannWin probabilityRoller
55.0%45.0%
KO / TKO
28%
Submission
22%
Decision
50%
Expected fight time: 10.4 min
What drives the pick

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

Predicted outcomes
Volkmann55%
Wins by
Model
Equity
Mkt
KO / TKO12%22%
Submission10%18%
Decision33%60%
Predicted output
Sig. strikes26 (1433)act 8
Takedowns1.4 (0.03.8)act 1
Roller45%
Wins by
Model
Equity
Mkt
KO / TKO16%35%
Submission12%27%
Decision17%38%
Predicted output
Sig. strikes22 (1228)act 0
Takedowns0.3 (0.01.5)act 0
Combined totals~47 sig strikes~1.7 takedownsmkt —
How it ends
mkt —
R126%
R214%
R310%
Distance50%
Fighter props
Most sig. strikestie 2.2%
Volkmann
56.5%-137
Roller
+13741.3%
Most takedownstie 30.6%
Volkmann
56.4%-432
Roller
+43213.1%
Significant strikes — over/under
Volkmann
Expected: 25.6
25.5
Over 25.5
42.7%
+134
Under 25.5
57.3%
-134
03264
Roller
Expected: 21.6
21.5
Over 21.5
42.7%
+134
Under 21.5
57.3%
-134
02754
Takedowns — over/under
Volkmann
Expected: 1.4
1.5
Over 1.5
45.2%
+121
Under 1.5
54.8%
-121
035
Roller
Expected: 0.3
0.5
Over 0.5
25.2%
+297
Under 0.5
74.8%
-297
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 10.4 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
Volkmann55.0%62.1%−7.1-170
Roller45.0%37.9%+7.1+160

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
60.7Striking59.7
Volkmann +0.9
80.5Grappling30.2
Volkmann +50.3
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
VolkmannRoller
Tale of the tape
Ratings (Elo)
1567
Pound-for-pound
1508
1589
Divisional
1510
1461
Striking offense
1492
1518
Striking defense
1491
1510
Grappling offense
1503
1489
Grappling defense
1507
Physical
32 yrs
Age
33 yrs
5'9"
Height
5'10"
71"
Reach
72"
Southpaw
Stance
Orthodox
Striking (UFC career)
1.25
Strikes landed / min
2.44
38%
Strike accuracy
36%
1.53
Strikes absorbed / min
3.18
55%
Strike defense
61%
Grappling (UFC career)
2.97
Takedowns / 15 min
1.47
58%
Takedown accuracy
22%
56%
Takedown defense
20%
2.0
Sub attempts / 15 min
0.6
Form & résumé
63%
UFC win rate
40%
-1
Win/loss streak
+1
80%
Last-5 win rate
40%
0%
Finish rate
50%
Recent opp. quality
132
Days since last fight
90
Recent form (last 5 UFC)
Jacob Volkmann
  • LPaul SassSUB R1
    Close -1904mo before
  • WEfrain EscuderoU-DEC R3
    Close -2659mo before
  • WDanny CastilloU-DEC R3
    Close -1201y 2mo before
  • WAntonio McKeeS-DEC R3
    Close +1701y 9mo before
  • WPaul KellyU-DEC R3
    Close -1152y 2mo before
Shane Roller
  • WJohn AlessioU-DEC R3
    Close -1503mo before
  • LMichael JohnsonU-DEC R3
    Close -2458mo before
  • LTJ GrantSUB R3
    Close -1741y before
  • LMelvin GuillardKO/TKO R1
    Close +2551y 3mo before
  • WThiago TavaresKO/TKO R2
    Close -1151y 7mo before
Volkmann — win / loss by method
Record: 14-3-0

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
2 wins, 0 losses
W
14% of wins
L
0% of losses
Submission
4 wins, 2 losses
W
29% of wins
L
67% of losses
Decision
8 wins, 1 loss
W
57% of wins
L
33% of losses
UFC
5win3loss0draw0NC
WinsLosses
0 (0%)KO/TKO(0%) 0
0 (0%)Submission(67%) 2
5 (100%)Decision(33%) 1
Non-UFC
9win0loss0draw0NC
WinsLosses
2 (22%)KO/TKO() 0
4 (44%)Submission() 0
3 (33%)Decision() 0
Roller — win / loss by method
Record: 11-6-0

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
3 wins, 3 losses
W
27% of wins
L
50% of losses
Submission
6 wins, 2 losses
W
55% of wins
L
33% of losses
Decision
2 wins, 1 loss
W
18% of wins
L
17% of losses
UFC
2win3loss0draw0NC
WinsLosses
1 (50%)KO/TKO(33%) 1
0 (0%)Submission(33%) 1
1 (50%)Decision(33%) 1
Non-UFC
9win3loss0draw0NC
WinsLosses
2 (22%)KO/TKO(67%) 2
6 (67%)Submission(33%) 1
1 (11%)Decision(0%) 0

Profiles

Experience
Volkmann
Roller
8
UFC fights
5
96.0 min · 12.0 avg
Octagon time
50.9 min · 10.2 avg
18y 10m
Career length
18y 10m
UFC schedule strength

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

Volkmann
Roller
117W–17L · 87.3%
Overall
102W–37L · 73.4%
79W–13L · 85.9%
Wins
49W–18L · 73.1%
38W–4L · 90.5%
Losses
53W–19L · 73.6%
Non-UFC schedule strength
Volkmann
Roller
86W–51L · 62.8%
Overall
83W–16L · 83.8%
86W–51L · 62.8%
Wins
61W–10L · 85.9%
0W–0L
Losses
22W–6L · 78.6%
Distance striking
Volkmann
Roller
1.73
Landed / min
3.54
21.2%
Accuracy
27.5%
68.4%
Defense
66.0%
0.00
Knockdowns / 15 min
0.29
22.9%
Time at distance
43.9%
Grappling & control
Volkmann
Roller
2.97
Takedowns / 15 min
1.47
57.6%
Takedown accuracy
21.7%
56.3%
Takedown defense
20.0%
2.03
Sub attempts / 15 min
0.59
69.2%
Control share
55.2%
Strike target map
Volkmann
  • Head73%(88)div 64%
  • Body14%(17)div 19%
  • Legs13%(15)div 17%
Roller
  • Head75%(93)div 64%
  • Body10%(13)div 19%
  • Legs15%(18)div 17%

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

Jacob Volkmann
CloseSSTDKDCtrl

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

Shane Roller
CloseSSTDKDCtrl

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