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UFC 271: Adesanya vs. Whittaker 2
Casey O'Neill
Casey O'Neill
8-0 · GBR
VS
Roxanne Modafferi
Roxanne Modafferi
25-19 · USA
February 12, 2022 · Houston, Texas, USA
Flyweight · 3 rounds
125.5lb
Weigh-in
126.0lb
Casey O'Neill def. Roxanne Modafferi by S-DEC, R3 5:00
Performance
Round by round
SSTDKDCtrl
R1
O'Neill72/1300/000:00
Modafferi44/1350/000:00
R2
O'Neill86/1420/100:00
Modafferi35/1181/100:05
R3
O'Neill71/1210/100:02
Modafferi41/1051/301:01
Total
O'Neill229/3930/200:02
Modafferi120/3582/401:06

Scorecards

O'Neill vs Modafferi

RdIvan GuzmanKerry HatleyRobert AlexanderCommunity
R110-910-99-109.9-9.1
R210-910-910-910-9
R39-109-109-109.8-9.2
Total29-2829-2828-2929.7-27.3

Media (19 cards) · avg 3027 · 19 O'Neill · 0 Modafferi

Official cards + public consensus via MMA Decisions. Per round: O'Neill-Modafferi.

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
O'NeillWin probabilityModafferi
83.0%17.0%
KO / TKO
40%
Submission
17%
Decision
44%
Expected fight time: 9.7 min
Retrospective pick: the walk-forward model's call at the time of the fight — persisted out-of-sample, with no hindsight about the result.
What drives the pick

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

Predicted outcomes
O'Neill83%
Wins by
Model
Equity
Mkt
KO / TKO36%43%20%
Submission14%17%13%
Decision33%40%42%
Predicted output
Sig. strikes54 (2273)act 229
Takedowns2.1 (0.05.5)act 0
Modafferi17%
Wins by
Model
Equity
Mkt
KO / TKO4%25%5%
Submission2%14%6%
Decision11%61%14%
Predicted output
Sig. strikes29 (1239)act 120
Takedowns0.3 (0.01.4)act 2
Combined totals~82 sig strikes~2.4 takedownsmkt —
How it ends
mkt —
R127%
R223%
R36%
Distance44%
Fighter props
Most sig. strikestie 1.1%
O'Neill
69.0%-230
Modafferi
+23030.0%
Most takedownstie 21.8%
O'Neill
68.4%-696
Modafferi
+6969.8%
Significant strikes — over/under
O'Neill
Expected: 53.7
53.5
Over 53.5
40.0%
+150
Under 53.5
60.0%
-150
068135
Modafferi
Expected: 28.7
28.5
Over 28.5
40.2%
+149
Under 28.5
59.8%
-149
03672
Takedowns — over/under
O'Neill
Expected: 2.1
2
Over 2
40.5%
+106
Exactly 2
16.6%
push
Under 2
42.9%
-106
047
Modafferi
Expected: 0.3
0.5
Over 0.5
24.2%
+313
Under 0.5
75.8%
-313
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 9.7 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
O'Neill83.0%76.2%+6.8-395
Modafferi17.0%23.8%−6.8+301
By method
O'Neill by KO/TKO32.9%20.3%+12.6+304
O'Neill by submission13.8%13.1%+0.7+528
O'Neill by decision36.2%41.9%−5.7-104
Modafferi by KO/TKO6.7%5.0%+1.7+1557
Modafferi by submission2.8%5.8%−3.0+1307
Modafferi by decision7.4%14.0%−6.6+488
Total rounds (over)
Over 1.5 rds73.1%75.0%−1.9-400
Over 2.5 rds49.8%64.2%−14.4-218
Goes the distance
Fight goes to decision43.7%60.3%−16.6-182

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
71.1Striking49.5
O'Neill +21.6
78.3Grappling26.1
O'Neill +52.2
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
O'NeillModafferi
Tale of the tape
Ratings (Elo)
1562
Pound-for-pound
1468
1563
Divisional
1478
1518
Striking offense
1500
1494
Striking defense
1480
1519
Grappling offense
1479
1501
Grappling defense
1497
Physical
24 yrs
Age
39 yrs
5'6"
Height
5'7"
69"
Reach
69"
Orthodox
Stance
Orthodox
Striking (UFC career)
5.48
Strikes landed / min
2.98
56%
Strike accuracy
30%
3.09
Strikes absorbed / min
4.87
38%
Strike defense
55%
Grappling (UFC career)
3.83
Takedowns / 15 min
1.25
50%
Takedown accuracy
26%
67%
Takedown defense
25%
1.4
Sub attempts / 15 min
0.1
Form & résumé
100%
UFC win rate
36%
+3
Win/loss streak
-2
100%
Last-5 win rate
40%
100%
Finish rate
25%
Recent opp. quality
133
Days since last fight
140
Recent form (last 5 UFC)
Casey O'Neill
  • WAntonina ShevchenkoKO/TKO R2
    Close -2414mo before
  • WLara ProcopioSUB R3
    Close +1408mo before
  • WShana DobsonKO/TKO R2
    Close -1611y before
Roxanne Modafferi
  • LTaila SantosU-DEC R3
    Close +3165mo before
  • LViviane AraujoU-DEC R3
    Close +2601y 1mo before
  • WAndrea LeeU-DEC R3
    Close +2401y 5mo before
  • LLauren MurphyU-DEC R3
    Close -1251y 8mo before
  • WMaycee BarberU-DEC R3
    Close +6552y 1mo before
O'Neill — win / loss by method
Record: 8-0-0

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
3 wins, 0 losses
W
38% of wins
L
Submission
2 wins, 0 losses
W
25% of wins
L
Decision
3 wins, 0 losses
W
38% of wins
L
UFC
3win0loss0draw0NC
WinsLosses
2 (67%)KO/TKO() 0
1 (33%)Submission() 0
0 (0%)Decision() 0
Non-UFC
5win0loss0draw0NC
WinsLosses
1 (20%)KO/TKO() 0
1 (20%)Submission() 0
3 (60%)Decision() 0
Modafferi — win / loss by method
Record: 25-19-0

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
4 wins, 1 loss
W
16% of wins
L
5% of losses
Submission
5 wins, 3 losses
W
20% of wins
L
16% of losses
Decision
16 wins, 15 losses
W
64% of wins
L
79% of losses
UFC
4win7loss0draw0NC
WinsLosses
1 (25%)KO/TKO(0%) 0
0 (0%)Submission(0%) 0
3 (75%)Decision(100%) 7
Non-UFC
21win12loss0draw0NC
WinsLosses
3 (14%)KO/TKO(8%) 1
5 (24%)Submission(25%) 3
13 (62%)Decision(67%) 8

Profiles

Experience
O'Neill
Modafferi
3
UFC fights
11
31.4 min · 10.5 avg
Octagon time
168.5 min · 15.3 avg
7y 4m
Career length
22y 9m
UFC schedule strength

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

O'Neill
Modafferi
20W–8L · 71.4%
Overall
99W–26L · 79.2%
20W–8L · 71.4%
Wins
36W–7L · 83.7%
0W–0L
Losses
63W–19L · 76.8%
Non-UFC schedule strength
O'Neill
Modafferi
14W–6L · 70.0%
Overall
293W–96L · 75.3%
14W–6L · 70.0%
Wins
168W–59L · 74.0%
0W–0L
Losses
125W–37L · 77.2%
Distance striking
O'Neill
Modafferi
10.06
Landed / min
5.26
42.2%
Accuracy
26.7%
46.5%
Defense
57.6%
0.00
Knockdowns / 15 min
0.09
23.1%
Time at distance
47.4%
Grappling & control
O'Neill
Modafferi
3.83
Takedowns / 15 min
1.25
50.0%
Takedown accuracy
25.9%
66.7%
Takedown defense
25.0%
1.43
Sub attempts / 15 min
0.09
81.5%
Control share
56.8%
Strike target map
O'Neill
  • Head76%(131)div 61%
  • Body17%(30)div 22%
  • Legs6%(11)div 17%
Modafferi
  • Head85%(425)div 61%
  • Body8%(42)div 22%
  • Legs7%(35)div 17%

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

Casey O'Neill
CloseSSTDKDCtrl

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

Roxanne Modafferi
CloseSSTDKDCtrl

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