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UFC Fight Night: Poirier vs. Pettis
Karl Roberson
Karl Roberson
5-0 · USA
VS
Darren Stewart
Darren Stewart
7-1 · GBR
November 11, 2017 · Norfolk, Virginia, USA
Middleweight · 3 rounds
184.5lb
Weigh-in
184.0lb
Karl Roberson def. Darren Stewart by SUB (Rear Naked Choke), R1 3:41
Performance
Round by round
SSTDKDCtrl
R1 · 3:41
Roberson17/231/101:14
Stewart6/200/100:34
Total
Roberson17/231/101:14
Stewart6/200/100:34

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
RobersonWin probabilityStewart
51.1%48.9%
KO / TKO
35%
Submission
27%
Decision
38%
Expected fight time: 9.1 min
What drives the pick

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

Predicted outcomes
Roberson51%
Wins by
Model
Equity
Mkt
KO / TKO16%31%
Submission16%32%
Decision19%37%
Predicted output
Sig. strikes27 (1535)act 17
Takedowns0.5 (0.02.0)act 1
Stewart49%
Wins by
Model
Equity
Mkt
KO / TKO20%40%
Submission10%20%
Decision19%40%
Predicted output
Sig. strikes29 (1638)act 6
Takedowns0.9 (0.02.9)act 0
Combined totals~56 sig strikes~1.5 takedownsmkt —
How it ends
mkt —
R135%
R219%
R38%
Distance38%
Fighter props
Most sig. strikestie 1.9%
Roberson
45.6%+115
Stewart
-11552.5%
Most takedownstie 36.3%
Roberson
22.8%+179
Stewart
-17940.9%
Significant strikes — over/under
Roberson
Expected: 27.2
27
Over 27
41.7%
+134
Exactly 27
2.4%
push
Under 27
55.9%
-134
03468
Stewart
Expected: 29.3
29.5
Over 29.5
42.0%
+138
Under 29.5
58.0%
-138
03774
Takedowns — over/under
Roberson
Expected: 0.5
0.5
Over 0.5
35.4%
+183
Under 0.5
64.6%
-183
035
Stewart
Expected: 0.9
1
Over 1
33.0%
+147
Exactly 1
18.5%
push
Under 1
48.5%
-147
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 9.1 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
Roberson51.1%67.2%−16.1-255
Stewart48.9%32.8%+16.1+185

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
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
RobersonStewart
Tale of the tape
Ratings (Elo)
1517
Pound-for-pound
1511
1517
Divisional
1526
1500
Striking offense
1496
1533
Striking defense
1504
1494
Grappling offense
1507
1500
Grappling defense
1496
Physical
27 yrs
Age
26 yrs
6'1"
Height
6'0"
74"
Reach
74"
Southpaw
Stance
Orthodox
Striking (UFC career)
Strikes landed / min
2.29
Strike accuracy
46%
Strikes absorbed / min
1.69
Strike defense
56%
Grappling (UFC career)
Takedowns / 15 min
1.81
Takedown accuracy
29%
Takedown defense
42%
Sub attempts / 15 min
0.0
Form & résumé
UFC win rate
0%
Win/loss streak
-2
Last-5 win rate
0%
Finish rate
Recent opp. quality
Days since last fight
238
Recent form (last 5 UFC)
Karl Roberson
No prior UFC fights.
Darren Stewart
  • LFrancimar BarrosoU-DEC R3
    Close -2108mo before
Roberson — win / loss by method
Record: 5-0-0

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
40% of wins
L
Submission
2 wins, 0 losses
W
40% of wins
L
Decision
1 win, 0 losses
W
20% of wins
L
UFC
0win0loss0draw0NC
WinsLosses
0 ()KO/TKO() 0
0 ()Submission() 0
0 ()Decision() 0
Non-UFC
5win0loss0draw0NC
WinsLosses
2 (40%)KO/TKO() 0
2 (40%)Submission() 0
1 (20%)Decision() 0
Stewart — win / loss by method
Record: 7-1-0, 1 NC

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
5 wins, 0 losses
W
71% of wins
L
0% of losses
Submission
0 wins, 0 losses
W
0% of wins
L
0% of losses
Decision
2 wins, 1 loss
W
29% of wins
L
100% of losses
UFC
0win1loss0draw1NC
WinsLosses
0 ()KO/TKO(0%) 0
0 ()Submission(0%) 0
0 ()Decision(100%) 1
Non-UFC
7win0loss0draw0NC
WinsLosses
5 (71%)KO/TKO() 0
0 (0%)Submission() 0
2 (29%)Decision() 0

Profiles

Experience
Roberson
Stewart
0
UFC fights
2
Octagon time
16.6 min · 8.3 avg
Career length
12y 2m
UFC schedule strength

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

Roberson
Stewart
Overall
18W–5L · 78.3%
Wins
0W–0L
Losses
18W–5L · 78.3%
Non-UFC schedule strength
Roberson
Stewart
25W–10L · 71.4%
Overall
34W–31L · 52.3%
25W–10L · 71.4%
Wins
34W–31L · 52.3%
0W–0L
Losses
0W–0L
Distance striking
Roberson
Stewart
Landed / min
2.65
Accuracy
30.8%
Defense
59.5%
Knockdowns / 15 min
0.00
Time at distance
36.5%
Grappling & control
Roberson
Stewart
Takedowns / 15 min
1.81
Takedown accuracy
28.6%
Takedown defense
41.7%
Sub attempts / 15 min
0.00
Control share
66.2%
Strike target map
Roberson
  • Head0%(0)div 63%
  • Body0%(0)div 19%
  • Legs0%(0)div 18%
  • No strike data on record.
Stewart
  • Head50%(19)div 63%
  • Body21%(8)div 19%
  • Legs29%(11)div 18%

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

Karl Roberson

No UFC fights on record.

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

Darren Stewart
CloseSSTDKDCtrl

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