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UFC 257: Poirier vs. McGregor
Marcin Prachnio
Marcin Prachnio
13-5 · POL
VS
January 23, 2021 · Abu Dhabi, Abu Dhabi, United Arab Emirates
Light Heavyweight · 3 rounds
206.0lb
Weigh-in
206.0lb
Marcin Prachnio def. Khalil Rountree Jr. by U-DEC, R3 5:00
Performance
Round by round
SSTDKDCtrl
R1
Prachnio30/540/000:00
Rountree Jr.16/380/000:00
R2
Prachnio32/700/000:00
Rountree Jr.20/480/000:00
R3
Prachnio40/920/200:05
Rountree Jr.13/620/000:00
Total
Prachnio102/2160/200:05
Rountree Jr.49/1480/000:00

Scorecards

Prachnio vs Rountree Jr.

RdAnders OhlssonBen CartlidgeEric ColónCommunity
R110-910-910-99.6-9.5
R29-109-109-109-10
R310-910-910-99.9-9.1
Total29-2829-2829-2828.5-28.6

Media (19 cards) · avg 2928 · 19 Prachnio · 0 Rountree Jr.

Official cards + public consensus via MMA Decisions. Per round: Prachnio-Rountree Jr..

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
PrachnioWin probabilityRountree Jr.
35.6%64.4%
KO / TKO
52%
Submission
15%
Decision
33%
Expected fight time: 8.4 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 Prachnio, blue toward Rountree Jr.. Tap a bar for why.

Predicted outcomes
Prachnio36%
Wins by
Model
Equity
Mkt
KO / TKO20%55%14%
Submission6%18%4%
Decision10%27%12%
Predicted output
Sig. strikes27 (1136)act 102
Takedowns0.4 (0.01.8)act 0
Rountree Jr.64%
Wins by
Model
Equity
Mkt
KO / TKO32%51%58%
Submission9%13%4%
Decision23%36%9%
Predicted output
Sig. strikes34 (1446)act 49
Takedowns0.4 (0.01.8)act 0
Combined totals~60 sig strikes~0.8 takedownsmkt —
How it ends
mkt —
R142%
R215%
R310%
Distance33%
Fighter props
Most sig. strikestie 1.6%
Prachnio
41.4%+138
Rountree Jr.
-13857.0%
Most takedownstie 55.8%
Prachnio
22.0%+101
Rountree Jr.
-10122.2%
Significant strikes — over/under
Prachnio
Expected: 26.5
26.5
Over 26.5
39.8%
+151
Under 26.5
60.2%
-151
03467
Rountree Jr.
Expected: 33.6
33.5
Over 33.5
39.9%
+151
Under 33.5
60.1%
-151
04284
Takedowns — over/under
Prachnio
Expected: 0.4
0.5
Over 0.5
26.6%
+276
Under 0.5
73.4%
-276
035
Rountree Jr.
Expected: 0.4
0.5
Over 0.5
26.8%
+274
Under 0.5
73.2%
-274
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 8.4 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
Prachnio35.6%24.5%+11.1+285
Rountree Jr.64.4%75.5%−11.1-400
By method
Prachnio by KO/TKO18.5%13.9%+4.6+500
Prachnio by submission5.3%3.6%+1.7+2199
Prachnio by decision11.8%11.9%−0.1+600
Rountree Jr. by KO/TKO33.4%57.6%−24.2-222
Rountree Jr. by submission9.6%3.6%+6.0+2199
Rountree Jr. by decision21.3%9.3%+12.0+800
Total rounds (over)
Over 1.5 rds57.8%37.5%+20.3+150
Goes the distance
Fight goes to decision33.2%23.4%+9.8+300

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
55.0Striking59.5
Rountree Jr. +4.6
0.0Grappling15.9
Rountree Jr. +15.9
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
PrachnioRountree Jr.
Tale of the tape
Ratings (Elo)
1489
Pound-for-pound
1516
1488
Divisional
1515
1496
Striking offense
1504
1497
Striking defense
1496
1477
Grappling offense
1479
1498
Grappling defense
1501
Physical
32 yrs
Age
30 yrs
6'3"
Height
6'1"
73"
Reach
76"
Orthodox
Stance
Southpaw
Striking (UFC career)
3.26
Strikes landed / min
3.01
48%
Strike accuracy
40%
4.38
Strikes absorbed / min
2.85
40%
Strike defense
47%
Grappling (UFC career)
0.00
Takedowns / 15 min
0.00
Takedown accuracy
0%
Takedown defense
46%
0.0
Sub attempts / 15 min
0.2
Form & résumé
0%
UFC win rate
44%
-3
Win/loss streak
-1
0%
Last-5 win rate
40%
Finish rate
75%
Recent opp. quality
154
Days since last fight
483
Recent form (last 5 UFC)
Marcin Prachnio
  • LMike RodriguezKO/TKO R1
    Close +1885mo before
  • LMagomed AnkalaevKO/TKO R1
    Close +4302y 4mo before
  • LSam AlveyKO/TKO R1
    Close -2202y 11mo before
Khalil Rountree Jr.
  • LIon CutelabaKO/TKO R1
    Close -1151y 4mo before
  • WEryk AndersU-DEC R3
    Close +1601y 9mo before
  • LJohnny WalkerKO/TKO R1
    Close -1552y 2mo before
  • WGokhan SakiKO/TKO R1
    Close +1402y 7mo before
  • WPaul CraigKO/TKO R1
    Close -1453y 6mo before
Prachnio — win / loss by method
Record: 13-5-0

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
10 wins, 4 losses
W
77% of wins
L
80% of losses
Submission
1 win, 0 losses
W
8% of wins
L
0% of losses
Decision
2 wins, 1 loss
W
15% of wins
L
20% of losses
UFC
0win3loss0draw0NC
WinsLosses
0 ()KO/TKO(100%) 3
0 ()Submission(0%) 0
0 ()Decision(0%) 0
Non-UFC
13win2loss0draw0NC
WinsLosses
10 (77%)KO/TKO(50%) 1
1 (8%)Submission(0%) 0
2 (15%)Decision(50%) 1
Rountree Jr. — win / loss by method
Record: 8-4-0, 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, 2 losses
W
63% of wins
L
50% of losses
Submission
0 wins, 1 loss
W
0% of wins
L
25% of losses
Decision
3 wins, 1 loss
W
38% of wins
L
25% of losses
UFC
4win4loss0draw1NC
WinsLosses
3 (75%)KO/TKO(50%) 2
0 (0%)Submission(25%) 1
1 (25%)Decision(25%) 1
Non-UFC
4win0loss0draw0NC
WinsLosses
2 (50%)KO/TKO() 0
0 (0%)Submission() 0
2 (50%)Decision() 0

Profiles

Experience
Prachnio
Rountree Jr.
3
UFC fights
9
9.8 min · 3.3 avg
Octagon time
61.0 min · 6.8 avg
13y 0m
Career length
12y 2m
UFC schedule strength

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

Prachnio
Rountree Jr.
50W–15L · 76.9%
Overall
65W–15L · 81.3%
0W–0L
Wins
26W–6L · 81.3%
50W–15L · 76.9%
Losses
39W–9L · 81.3%
Non-UFC schedule strength
Prachnio
Rountree Jr.
120W–43L · 73.6%
Overall
12W–3L · 80.0%
115W–41L · 73.7%
Wins
12W–3L · 80.0%
5W–2L · 71.4%
Losses
0W–0L
Distance striking
Prachnio
Rountree Jr.
4.04
Landed / min
3.64
42.9%
Accuracy
36.3%
49.0%
Defense
53.2%
0.00
Knockdowns / 15 min
1.97
60.4%
Time at distance
66.1%
Grappling & control
Prachnio
Rountree Jr.
0.00
Takedowns / 15 min
0.00
Takedown accuracy
0.0%
Takedown defense
46.2%
0.00
Sub attempts / 15 min
0.25
24.7%
Control share
7.5%
Strike target map
Prachnio
  • Head16%(5)div 65%
  • Body25%(8)div 19%
  • Legs59%(19)div 16%
Rountree Jr.
  • Head60%(110)div 65%
  • Body17%(32)div 19%
  • Legs23%(42)div 16%

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

Marcin Prachnio
CloseSSTDKDCtrl

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

Khalil Rountree Jr.
CloseSSTDKDCtrl

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