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UFC Fight Night: Emmett vs. Stephens
Sam Alvey
Sam Alvey
31-10 · USA
VS
Marcin Prachnio
Marcin Prachnio
13-2 · POL
February 24, 2018 · Orlando, Florida, USA
Light Heavyweight · 3 rounds
206.0lb
Weigh-in
205.5lb
Sam Alvey def. Marcin Prachnio by KO/TKO (Punch), R1 4:23
Performance
Round by round
SSTDKDCtrl
R1 · 4:23
Alvey10/191/121:41
Prachnio15/240/000:14
Total
Alvey10/191/121:41
Prachnio15/240/000:14

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
AlveyWin probabilityPrachnio
32.4%67.6%
KO / TKO
49%
Submission
3%
Decision
48%
Expected fight time: 10.2 min
What drives the pick

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

Predicted outcomes
Alvey32%
Wins by
Model
Equity
Mkt
KO / TKO14%45%
Submission1%4%
Decision17%51%
Predicted output
Sig. strikes38 (2150)act 10
Takedowns0.2 (0.00.5)act 1
Prachnio68%
Wins by
Model
Equity
Mkt
KO / TKO35%51%
Submission2%3%
Decision31%46%
Predicted output
Sig. strikes57 (3375)act 15
Takedowns0.1 (0.00.0)act 0
Combined totals~96 sig strikes~0.3 takedownsmkt —
How it ends
mkt —
R126%
R217%
R39%
Distance48%
Fighter props
Most sig. strikestie 1.1%
Alvey
31.2%+217
Prachnio
-21767.8%
Most takedownstie 78.3%
Alvey
12.5%-135
Prachnio
+1359.2%
Significant strikes — over/under
Alvey
Expected: 38.1
38
Over 38
41.9%
+135
Exactly 38
1.7%
push
Under 38
56.4%
-135
04896
Prachnio
Expected: 57.4
57.5
Over 57.5
42.4%
+136
Under 57.5
57.6%
-136
072144
Takedowns — over/under
Alvey
Expected: 0.2
0
Over 0
13.4%
Exactly 0
86.6%
push
Under 0
0.0%
035
Prachnio
Expected: 0.1
0
Over 0
10.2%
Exactly 0
89.8%
push
Under 0
0.0%
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 10.2 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
Alvey32.4%34.2%−1.8+180
Prachnio67.6%65.8%+1.8-220

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
AlveyPrachnio
Tale of the tape
Ratings (Elo)
1582
Pound-for-pound
1536
1544
Divisional
1536
1498
Striking offense
1500
1513
Striking defense
1533
1477
Grappling offense
1480
1533
Grappling defense
1500
Physical
31 yrs
Age
29 yrs
6'2"
Height
6'3"
75"
Reach
73"
Southpaw
Stance
Orthodox
Striking (UFC career)
3.08
Strikes landed / min
46%
Strike accuracy
3.18
Strikes absorbed / min
55%
Strike defense
Grappling (UFC career)
0.00
Takedowns / 15 min
0%
Takedown accuracy
84%
Takedown defense
0.1
Sub attempts / 15 min
Form & résumé
62%
UFC win rate
-1
Win/loss streak
60%
Last-5 win rate
63%
Finish rate
Recent opp. quality
126
Days since last fight
Recent form (last 5 UFC)
Sam Alvey
  • LRamazan EmeevU-DEC R3
    Close +1304mo before
  • WRashad EvansS-DEC R3
    Close -1307mo before
  • LThales LeitesU-DEC R3
    Close +10510mo before
  • WNate MarquardtU-DEC R3
    Close -1401y 1mo before
  • WAlex NicholsonU-DEC R3
    Close -1651y 4mo before
Marcin Prachnio
No prior UFC fights.
Alvey — win / loss by method
Record: 31-10-0, 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
18 wins, 1 loss
W
58% of wins
L
10% of losses
Submission
3 wins, 1 loss
W
10% of wins
L
10% of losses
Decision
10 wins, 8 losses
W
32% of wins
L
80% of losses
UFC
8win5loss0draw0NC
WinsLosses
4 (50%)KO/TKO(20%) 1
1 (13%)Submission(0%) 0
3 (38%)Decision(80%) 4
Non-UFC
23win5loss0draw1NC
WinsLosses
14 (61%)KO/TKO(0%) 0
2 (9%)Submission(20%) 1
7 (30%)Decision(80%) 4
Prachnio — win / loss by method
Record: 13-2-0

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, 1 loss
W
77% of wins
L
50% 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
50% of losses
UFC
0win0loss0draw0NC
WinsLosses
0 ()KO/TKO() 0
0 ()Submission() 0
0 ()Decision() 0
Non-UFC
13win2loss0draw0NC
WinsLosses
10 (77%)KO/TKO(50%) 1
1 (8%)Submission(0%) 0
2 (15%)Decision(50%) 1

Profiles

Experience
Alvey
Prachnio
13
UFC fights
0
126.6 min · 9.7 avg
Octagon time
18y 0m
Career length
UFC schedule strength

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

Alvey
Prachnio
188W–56L · 77.0%
Overall
107W–35L · 75.4%
Wins
81W–21L · 79.4%
Losses
Non-UFC schedule strength
Alvey
Prachnio
265W–160L · 62.4%
Overall
120W–43L · 73.6%
220W–153L · 59.0%
Wins
115W–41L · 73.7%
45W–7L · 86.5%
Losses
5W–2L · 71.4%
Distance striking
Alvey
Prachnio
2.91
Landed / min
38.2%
Accuracy
57.7%
Defense
0.47
Knockdowns / 15 min
67.0%
Time at distance
Grappling & control
Alvey
Prachnio
0.00
Takedowns / 15 min
0.0%
Takedown accuracy
84.1%
Takedown defense
0.12
Sub attempts / 15 min
22.0%
Control share
Strike target map
Alvey
  • Head66%(258)div 66%
  • Body21%(83)div 18%
  • Legs13%(49)div 16%
Prachnio
  • Head0%(0)div 66%
  • Body0%(0)div 18%
  • Legs0%(0)div 16%
  • No strike data on record.

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

Sam Alvey
CloseSSTDKDCtrl

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

Marcin Prachnio

No UFC fights on record.

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