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UFC 99: The Comeback
Dennis Siver
Dennis Siver
13-6 · DEU
VS
Dale Hartt
Dale Hartt
6-1 · USA
June 13, 2009 · Cologne, North Rhine-Westphalia, Germany
Lightweight · 3 rounds
156.0lb
Weigh-in
156.0lb
Dennis Siver def. Dale Hartt by SUB (Rear Naked Choke), R1 3:23
Performance
Round by round
SSTDKDCtrl
R1 · 3:23
Siver8/230/001:10
Hartt5/161/100:29
Total
Siver8/230/001:10
Hartt5/161/100:29

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 probabilityHartt
66.2%33.8%
KO / TKO
23%
Submission
43%
Decision
34%
Expected fight time: 8.2 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 Hartt. Tap a bar for why.

Predicted outcomes
Siver66%
Wins by
Model
Equity
Mkt
KO / TKO15%23%
Submission28%43%
Decision23%34%
Predicted output
Sig. strikes33 (1844)act 8
Takedowns0.4 (0.01.6)act 0
Hartt34%
Wins by
Model
Equity
Mkt
KO / TKO8%23%
Submission15%43%
Decision11%34%
Predicted output
Sig. strikes25 (1433)act 5
Takedowns0.3 (0.01.3)act 1
Combined totals~59 sig strikes~0.6 takedownsmkt —
How it ends
mkt —
R149%
R25%
R312%
Distance34%
Fighter props
Most sig. strikestie 1.8%
Siver
61.5%-167
Hartt
+16736.8%
Most takedownstie 50.5%
Siver
26.7%-118
Hartt
+11822.7%
Significant strikes — over/under
Siver
Expected: 33.5
33.5
Over 33.5
42.4%
+136
Under 33.5
57.6%
-136
04284
Hartt
Expected: 25.4
25.5
Over 25.5
42.3%
+136
Under 25.5
57.7%
-136
03264
Takedowns — over/under
Siver
Expected: 0.4
0.5
Over 0.5
33.5%
+198
Under 0.5
66.5%
-198
035
Hartt
Expected: 0.3
0.5
Over 0.5
30.0%
+233
Under 0.5
70.0%
-233
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 8.2 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
Siver66.2%61.5%+4.7-178
Hartt33.8%38.5%−4.7+150

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
59.1Striking64.4
Hartt +5.2
26.1Grappling31.9
Hartt +5.9
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
SiverHartt
Tale of the tape
Ratings (Elo)
1501
Pound-for-pound
1517
1515
Divisional
1517
1516
Striking offense
1507
1514
Striking defense
1504
1487
Grappling offense
1492
1494
Grappling defense
1490
Physical
30 yrs
Age
30 yrs
5'6"
Height
5'10"
70"
Reach
69"
Orthodox
Stance
Orthodox
Striking (UFC career)
2.49
Strikes landed / min
1.01
31%
Strike accuracy
38%
2.49
Strikes absorbed / min
1.24
57%
Strike defense
67%
Grappling (UFC career)
0.79
Takedowns / 15 min
0.00
33%
Takedown accuracy
25%
Takedown defense
25%
0.0
Sub attempts / 15 min
3.4
Form & résumé
40%
UFC win rate
50%
+1
Win/loss streak
+1
40%
Last-5 win rate
50%
100%
Finish rate
100%
Recent opp. quality
147
Days since last fight
185
Recent form (last 5 UFC)
Dennis Siver
  • WNate MohrKO/TKO R3
    Close -1615mo before
  • LMelvin GuillardKO/TKO R1
    Close +17811mo before
  • LGray MaynardU-DEC R3
    Close +3011y 5mo before
  • WNaoyuki KotaniKO/TKO R2
    Close +1651y 9mo before
  • LJess LiaudinSUB R1
    Close -1352y 2mo before
Dale Hartt
  • WCorey HillKO/TKO R2
    Close +2566mo before
  • LShannon GugertySUB R1
    Close +19311mo before
Siver — win / loss by method
Record: 13-6-0

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
6 wins, 1 loss
W
46% of wins
L
17% of losses
Submission
5 wins, 4 losses
W
38% of wins
L
67% of losses
Decision
2 wins, 1 loss
W
15% of wins
L
17% of losses
UFC
2win3loss0draw0NC
WinsLosses
2 (100%)KO/TKO(33%) 1
0 (0%)Submission(33%) 1
0 (0%)Decision(33%) 1
Non-UFC
11win3loss0draw0NC
WinsLosses
4 (36%)KO/TKO(0%) 0
5 (45%)Submission(100%) 3
2 (18%)Decision(0%) 0
Hartt — win / loss by method
Record: 6-1-0

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, 0 losses
W
67% of wins
L
0% of losses
Submission
2 wins, 1 loss
W
33% of wins
L
100% of losses
Decision
0 wins, 0 losses
W
0% of wins
L
0% of losses
UFC
1win1loss0draw0NC
WinsLosses
1 (100%)KO/TKO(0%) 0
0 (0%)Submission(100%) 1
0 (0%)Decision(0%) 0
Non-UFC
5win0loss0draw0NC
WinsLosses
3 (60%)KO/TKO() 0
2 (40%)Submission() 0
0 (0%)Decision() 0

Profiles

Experience
Siver
Hartt
5
UFC fights
2
37.8 min · 7.6 avg
Octagon time
8.9 min · 4.4 avg
22y 5m
Career length
21y 8m
UFC schedule strength

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

Siver
Hartt
62W–26L · 70.5%
Overall
12W–3L · 80.0%
25W–11L · 69.4%
Wins
2W–1L · 66.7%
37W–15L · 71.2%
Losses
10W–2L · 83.3%
Non-UFC schedule strength
Siver
Hartt
91W–50L · 64.5%
Overall
16W–7L · 69.6%
67W–45L · 59.8%
Wins
16W–7L · 69.6%
24W–5L · 82.8%
Losses
0W–0L
Distance striking
Siver
Hartt
4.14
Landed / min
2.82
27.9%
Accuracy
39.1%
58.3%
Defense
65.4%
0.79
Knockdowns / 15 min
0.00
43.5%
Time at distance
35.9%
Grappling & control
Siver
Hartt
0.79
Takedowns / 15 min
0.00
33.3%
Takedown accuracy
25.0%
Takedown defense
25.0%
0.00
Sub attempts / 15 min
3.38
32.2%
Control share
2.1%
Strike target map
Siver
  • Head68%(64)div 67%
  • Body7%(7)div 18%
  • Legs24%(23)div 15%
Hartt
  • Head0%(0)div 67%
  • Body11%(1)div 18%
  • Legs89%(8)div 15%

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.

Dale Hartt
CloseSSTDKDCtrl

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