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UFC Fight Night: Chiesa vs. Lee
Dennis Siver
Dennis Siver
22-11 · DEU
VS
BJ Penn
BJ Penn
16-11-2 · USA
June 25, 2017 · Oklahoma City, Oklahoma, USA
Featherweight · 3 rounds
146.0lb
Weigh-in
146.0lb
Dennis Siver def. BJ Penn by M-DEC, R3 5:00
Performance
Round by round
SSTDKDCtrl
R1
Siver26/980/100:11
Penn22/390/000:12
R2
Siver21/650/000:00
Penn21/410/011:50
R3
Siver56/1170/000:00
Penn14/270/000:00
Total
Siver103/2800/100:11
Penn57/1070/012:02

Scorecards

Siver vs Penn

RdCardo UrsoGerald RitterMarcos RosalesCommunity
R110-910-99-109.9-9.1
R29-109-109-109-10
R310-910-810-810-8.3
Total29-2829-2728-2828.9-27.4

Media (17 cards) · avg 28.927.6 · 16 Siver · 0 Penn · 1 draw

Official cards + public consensus via MMA Decisions. Per round: Siver-Penn.

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
SiverWin probabilityPenn
47.6%52.4%
KO / TKO
34%
Submission
1%
Decision
64%
Expected fight time: 12.7 min
What drives the pick

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

Predicted outcomes
Siver48%
Wins by
Model
Equity
Mkt
KO / TKO12%26%
Submission1%1%
Decision35%73%
Predicted output
Sig. strikes70 (4091)act 103
Takedowns0.2 (0.00.7)act 0
Penn52%
Wins by
Model
Equity
Mkt
KO / TKO22%42%
Submission1%2%
Decision29%56%
Predicted output
Sig. strikes43 (2456)act 57
Takedowns0.5 (0.01.9)act 0
Combined totals~112 sig strikes~0.6 takedownsmkt —
How it ends
mkt —
R17%
R213%
R316%
Distance64%
Fighter props
Most sig. strikestie 0.9%
Siver
71.1%-254
Penn
+25428.0%
Most takedownstie 57.7%
Siver
12.1%+251
Penn
-25130.2%
Significant strikes — over/under
Siver
Expected: 69.6
69.5
Over 69.5
42.6%
+135
Under 69.5
57.4%
-135
088175
Penn
Expected: 42.7
42.5
Over 42.5
42.8%
+134
Under 42.5
57.2%
-134
054107
Takedowns — over/under
Siver
Expected: 0.2
0
Over 0
16.0%
Exactly 0
84.0%
push
Under 0
0.0%
035
Penn
Expected: 0.5
0.5
Over 0.5
33.5%
+198
Under 0.5
66.5%
-198
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 12.7 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
Siver47.6%55.3%−7.7-135
Penn52.4%44.7%+7.7+115

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
66.6Striking63.5
Siver +3.2
42.3Grappling59.2
Penn +16.9
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
SiverPenn
Tale of the tape
Ratings (Elo)
1565
Pound-for-pound
1551
1522
Divisional
1474
1519
Striking offense
1486
1521
Striking defense
1510
1482
Grappling offense
1493
1513
Grappling defense
1548
Physical
38 yrs
Age
38 yrs
5'6"
Height
5'9"
70"
Reach
70"
Orthodox
Stance
Orthodox
Striking (UFC career)
3.66
Strikes landed / min
2.70
32%
Strike accuracy
48%
2.58
Strikes absorbed / min
3.25
66%
Strike defense
56%
Grappling (UFC career)
0.93
Takedowns / 15 min
1.21
33%
Takedown accuracy
58%
65%
Takedown defense
76%
0.4
Sub attempts / 15 min
0.6
Form & résumé
55%
UFC win rate
55%
-2
Win/loss streak
-4
20%
Last-5 win rate
0%
45%
Finish rate
92%
Recent opp. quality
736
Days since last fight
161
Recent form (last 5 UFC)
Dennis Siver
  • LTatsuya KawajiriU-DEC R3
    Close -1502y before
  • LConor McGregorKO/TKO R2
    Close +7752y 5mo before
  • WCharles RosaU-DEC R3
    Close -2902y 9mo before
  • LCub SwansonKO/TKO R3
    Close +1674y before
  • WNam PhanU-DEC R3
    Close -2904y 7mo before
BJ Penn
  • LYair RodriguezKO/TKO R2
    Close +2905mo before
  • LFrankie EdgarKO/TKO R3
    Close +3303y before
  • LRory MacDonaldU-DEC R3
    Close +2754y 7mo before
  • LNick DiazU-DEC R3
    Close +1055y 8mo before
  • DJon FitchM-DEC R3
    !Close +1606y 4mo before
Siver — win / loss by method
Record: 22-11-0, 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
7 wins, 3 losses
W
32% of wins
L
27% of losses
Submission
7 wins, 5 losses
W
32% of wins
L
45% of losses
Decision
8 wins, 3 losses
W
36% of wins
L
27% of losses
UFC
11win8loss0draw1NC
WinsLosses
3 (27%)KO/TKO(38%) 3
2 (18%)Submission(25%) 2
6 (55%)Decision(38%) 3
Non-UFC
11win3loss0draw0NC
WinsLosses
4 (36%)KO/TKO(0%) 0
5 (45%)Submission(100%) 3
2 (18%)Decision(0%) 0
Penn — win / loss by method
Record: 16-11-2

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
7 wins, 4 losses
W
44% of wins
L
36% of losses
Submission
6 wins, 0 losses
W
38% of wins
L
0% of losses
Decision
3 wins, 7 losses
W
19% of wins
L
64% of losses
UFC
12win10loss2draw0NC
WinsLosses
7 (58%)KO/TKO(40%) 4
4 (33%)Submission(0%) 0
1 (8%)Decision(60%) 6
Non-UFC
4win1loss0draw0NC
WinsLosses
0 (0%)KO/TKO(0%) 0
2 (50%)Submission(0%) 0
2 (50%)Decision(100%) 1

Profiles

Experience
Siver
Penn
20
UFC fights
24
209.3 min · 10.5 avg
Octagon time
323.5 min · 13.5 avg
22y 5m
Career length
25y 3m
UFC schedule strength

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

Siver
Penn
278W–77L · 78.3%
Overall
402W–60L · 87.0%
147W–41L · 78.2%
Wins
230W–37L · 86.1%
131W–36L · 78.4%
Losses
172W–23L · 88.2%
Non-UFC schedule strength
Siver
Penn
91W–50L · 64.5%
Overall
43W–8L · 84.3%
67W–45L · 59.8%
Wins
38W–8L · 82.6%
24W–5L · 82.8%
Losses
5W–0L · 100.0%
Distance striking
Siver
Penn
5.01
Landed / min
3.63
29.5%
Accuracy
39.4%
69.4%
Defense
62.3%
0.50
Knockdowns / 15 min
0.28
60.5%
Time at distance
44.5%
Grappling & control
Siver
Penn
0.93
Takedowns / 15 min
1.21
33.3%
Takedown accuracy
57.8%
65.0%
Takedown defense
76.4%
0.36
Sub attempts / 15 min
0.56
50.1%
Control share
35.4%
Strike target map
Siver
  • Head57%(435)div 64%
  • Body14%(109)div 19%
  • Legs29%(222)div 17%
Penn
  • Head78%(679)div 64%
  • Body16%(143)div 19%
  • Legs6%(53)div 17%

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

Dennis Siver
CloseSSTDKDCtrl

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

BJ Penn
CloseSSTDKDCtrl

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