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UFC Fight Night: Song vs. Simon
Song Yadong
Song Yadong
19-7-1 · CHN
VS
Ricky Simon
Ricky Simon
20-3 · USA
April 29, 2023 · Las Vegas, Nevada, USA
Bantamweight · 5 rounds · Main event
Song Yadong def. Ricky Simon by KO/TKO (Punch), R5 1:10
Performance
Round by round
SSTDKDCtrl
R1
Yadong11/280/000:12
Simon12/230/200:08
R2
Yadong25/570/000:00
Simon15/362/200:39
R3
Yadong20/570/000:00
Simon13/310/200:03
R4
Yadong27/560/010:02
Simon15/390/300:01
R5 · 1:10
Yadong22/300/010:13
Simon5/100/000:00
Total
Yadong105/2280/020:27
Simon60/1392/900:51

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
YadongWin probabilitySimon
41.3%58.7%
KO / TKO
33%
Submission
17%
Decision
50%
Expected fight time: 16.8 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 Yadong, blue toward Simon. Tap a bar for why.

Predicted outcomes
Yadong41%
Wins by
Model
Equity
Mkt
KO / TKO17%41%28%
Submission5%13%7%
Decision19%46%12%
Predicted output
Sig. strikes69 (2993)act 105
Takedowns0.3 (0.01.3)act 0
Simon59%
Wins by
Model
Equity
Mkt
KO / TKO17%28%11%
Submission11%19%15%
Decision31%53%27%
Predicted output
Sig. strikes63 (2686)act 60
Takedowns2.5 (0.06.2)act 2
Combined totals~132 sig strikes~2.8 takedownsmkt —
How it ends
mkt —
R118%
R218%
R37%
R44%
R53%
Distance50%
Fighter props
Most sig. strikestie 0.7%
Yadong
52.1%-111
Simon
+11147.1%
Most takedownstie 16.5%
Yadong
7.4%+1022
Simon
-102276.1%
Significant strikes — over/under
Yadong
Expected: 68.5
68.5
Over 68.5
39.8%
+151
Under 68.5
60.2%
-151
086172
Simon
Expected: 63.0
63
Over 63
39.4%
+152
Exactly 63
0.8%
push
Under 63
59.9%
-152
079158
Takedowns — over/under
Yadong
Expected: 0.3
0.5
Over 0.5
21.2%
+372
Under 0.5
78.8%
-372
035
Simon
Expected: 2.5
2.5
Over 2.5
47.2%
+112
Under 2.5
52.8%
-112
048

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 16.8 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
Yadong41.3%44.4%−3.1+115
Simon58.7%55.6%+3.1-140
By method
Yadong by KO/TKO13.8%27.9%−14.1+199
Yadong by submission6.9%6.5%+0.4+1172
Yadong by decision20.6%12.3%+8.3+576
Simon by KO/TKO19.6%10.8%+8.8+668
Simon by submission9.8%15.1%−5.3+450
Simon by decision29.3%27.4%+1.9+204
Total rounds (over)
Over 1.5 rds82.1%72.3%+9.8-347
Over 2.5 rds64.2%59.6%+4.6-176
Over 3.5 rds57.0%50.7%+6.3-119
Over 4.5 rds52.9%45.0%+7.9+108
Goes the distance
Fight goes to decision50.0%41.7%+8.3+124

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
66.4Striking66.6
Simon +0.2
51.1Grappling74.6
Simon +23.5
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
YadongSimon
Tale of the tape
Ratings (Elo)
1599
Pound-for-pound
1632
1572
Divisional
1616
1527
Striking offense
1500
1516
Striking defense
1504
1492
Grappling offense
1546
1530
Grappling defense
1524
Physical
25 yrs
Age
30 yrs
5'8"
Height
5'6"
67"
Reach
69"
Orthodox
Stance
Orthodox
Striking (UFC career)
4.55
Strikes landed / min
3.01
42%
Strike accuracy
44%
3.93
Strikes absorbed / min
3.02
59%
Strike defense
63%
Grappling (UFC career)
0.63
Takedowns / 15 min
5.59
56%
Takedown accuracy
48%
71%
Takedown defense
77%
0.3
Sub attempts / 15 min
0.5
Form & résumé
80%
UFC win rate
80%
-1
Win/loss streak
+5
60%
Last-5 win rate
100%
63%
Finish rate
50%
Recent opp. quality
224
Days since last fight
287
Recent form (last 5 UFC)
Song Yadong
  • LCory SandhagenKO/TKO R4
    Close +1677mo before
  • WMarlon MoraesKO/TKO R1
    Close -2941y 2mo before
  • WJulio ArceKO/TKO R2
    Close -1451y 5mo before
  • WCasey KenneyS-DEC R3
    Close +1031y 9mo before
  • LKyler PhillipsU-DEC R3
    Close -1942y 2mo before
Ricky Simon
  • WJack ShoreSUB R2
    Close +1499mo before
  • WRaphael AssuncaoKO/TKO R2
    Close -2931y 4mo before
  • WBrian KelleherU-DEC R3
    Close -2512y 2mo before
  • WGaetano PirrelloSUB R2
    Close -4502y 3mo before
  • WRay BorgS-DEC R3
    Close -1703y before
Yadong — win / loss by method
Record: 19-7-1, 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
8 wins, 2 losses
W
42% of wins
L
29% of losses
Submission
3 wins, 0 losses
W
16% of wins
L
0% of losses
Decision
8 wins, 4 losses
W
42% of wins
L
57% of losses
DQ / other
0 wins, 1 loss
W
0% of wins
L
14% of losses
UFC
8win2loss1draw0NC
WinsLosses
4 (50%)KO/TKO(50%) 1
1 (13%)Submission(0%) 0
3 (38%)Decision(50%) 1
Non-UFC
11win5loss0draw1NC
WinsLosses
4 (36%)KO/TKO(20%) 1
2 (18%)Submission(0%) 0
5 (45%)Decision(60%) 3
0 (0%)DQ / other(20%) 1
Simon — win / loss by method
Record: 20-3-0

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
30% of wins
L
33% of losses
Submission
4 wins, 1 loss
W
20% of wins
L
33% of losses
Decision
10 wins, 1 loss
W
50% of wins
L
33% of losses
UFC
8win2loss0draw0NC
WinsLosses
1 (13%)KO/TKO(50%) 1
3 (38%)Submission(0%) 0
4 (50%)Decision(50%) 1
Non-UFC
12win1loss0draw0NC
WinsLosses
5 (42%)KO/TKO(0%) 0
1 (8%)Submission(100%) 1
6 (50%)Decision(0%) 0

Profiles

Experience
Yadong
Simon
11
UFC fights
10
120.0 min · 10.9 avg
Octagon time
115.5 min · 11.5 avg
13y 2m
Career length
12y 6m
UFC schedule strength

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

Yadong
Simon
150W–46L · 76.5%
Overall
182W–54L · 77.1%
128W–41L · 75.7%
Wins
132W–40L · 76.7%
22W–5L · 81.5%
Losses
50W–14L · 78.1%
Non-UFC schedule strength
Yadong
Simon
83W–34L · 70.9%
Overall
91W–66L · 58.0%
42W–15L · 73.7%
Wins
78W–63L · 55.3%
41W–19L · 68.3%
Losses
13W–3L · 81.3%
Distance striking
Yadong
Simon
5.45
Landed / min
4.00
39.4%
Accuracy
37.2%
62.1%
Defense
65.3%
0.63
Knockdowns / 15 min
0.52
71.8%
Time at distance
53.7%
Grappling & control
Yadong
Simon
0.63
Takedowns / 15 min
5.59
55.6%
Takedown accuracy
47.8%
71.4%
Takedown defense
76.9%
0.25
Sub attempts / 15 min
0.52
47.0%
Control share
90.4%
Strike target map
Yadong
  • Head66%(359)div 62%
  • Body21%(114)div 21%
  • Legs13%(73)div 17%
Simon
  • Head66%(228)div 62%
  • Body17%(60)div 21%
  • Legs17%(60)div 17%

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

Song Yadong
CloseSSTDKDCtrl

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

Ricky Simon
CloseSSTDKDCtrl

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