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UFC 303: Pereira vs. Prochazka 2
Macy Chiasson
Macy Chiasson
9-3 · USA
VS
Mayra Bueno Silva
Mayra Bueno Silva
10-3-1 · BRA
June 29, 2024 · Las Vegas, Nevada, USA
Bantamweight · 3 rounds
135.5lb
Weigh-in
136.0lb
Macy Chiasson def. Mayra Bueno Silva by KO/TKO (Cut), R2 1:58
Performance
Round by round
SSTDKDCtrl
R1
Chiasson37/620/000:28
Bueno Silva42/520/400:58
R2 · 1:58
Chiasson13/231/101:20
Bueno Silva4/70/000:21
Total
Chiasson50/851/101:48
Bueno Silva46/590/401:19

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
ChiassonWin probabilityBueno Silva
61.7%38.3%
KO / TKO
30%
Submission
36%
Decision
33%
Expected fight time: 8.5 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 Chiasson, blue toward Bueno Silva. Tap a bar for why.

Predicted outcomes
Chiasson62%
Wins by
Model
Equity
Mkt
KO / TKO21%34%8%
Submission18%29%10%
Decision23%37%31%
Predicted output
Sig. strikes34 (1446)act 50
Takedowns1.0 (0.03.3)act 1
Bueno Silva38%
Wins by
Model
Equity
Mkt
KO / TKO9%24%7%
Submission19%49%22%
Decision10%27%22%
Predicted output
Sig. strikes28 (1138)act 46
Takedowns0.6 (0.02.3)act 0
Combined totals~62 sig strikes~1.5 takedownsmkt —
How it ends
mkt —
R139%
R219%
R39%
Distance33%
Fighter props
Most sig. strikestie 1.5%
Chiasson
55.5%-129
Bueno Silva
+12943.0%
Most takedownstie 32.8%
Chiasson
43.4%-183
Bueno Silva
+18323.7%
Significant strikes — over/under
Chiasson
Expected: 34.3
34.5
Over 34.5
39.5%
+153
Under 34.5
60.5%
-153
04386
Bueno Silva
Expected: 28.2
28
Over 28
39.3%
+150
Exactly 28
1.7%
push
Under 28
59.0%
-150
03671
Takedowns — over/under
Chiasson
Expected: 1.0
1
Over 1
35.2%
+125
Exactly 1
20.8%
push
Under 1
44.0%
-125
035
Bueno Silva
Expected: 0.6
0.5
Over 0.5
38.1%
+163
Under 0.5
61.9%
-163
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 8.5 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
Chiasson61.7%50.8%+10.9-114
Bueno Silva38.3%49.2%−10.9-107
By method
Chiasson by KO/TKO18.7%8.2%+10.5+920
Chiasson by submission22.5%10.1%+12.4+727
Chiasson by decision20.5%30.7%−10.2+171
Bueno Silva by KO/TKO11.6%7.2%+4.4+1053
Bueno Silva by submission14.0%21.9%−7.9+280
Bueno Silva by decision12.7%21.9%−9.2+279
Total rounds (over)
Over 1.5 rds61.1%72.6%−11.5-355
Over 2.5 rds42.6%60.8%−18.2-185
Goes the distance
Fight goes to decision33.2%55.8%−22.6-147

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
64.7Striking63.9
Chiasson +0.8
51.8Grappling58.6
Bueno Silva +6.8
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
ChiassonBueno Silva
Tale of the tape
Ratings (Elo)
1562
Pound-for-pound
1547
1565
Divisional
1548
1499
Striking offense
1501
1500
Striking defense
1496
1525
Grappling offense
1520
1490
Grappling defense
1488
Physical
32 yrs
Age
32 yrs
5'11"
Height
5'6"
72"
Reach
66"
Orthodox
Stance
Orthodox
Striking (UFC career)
3.53
Strikes landed / min
3.85
45%
Strike accuracy
58%
2.53
Strikes absorbed / min
4.89
47%
Strike defense
53%
Grappling (UFC career)
2.38
Takedowns / 15 min
0.69
37%
Takedown accuracy
38%
63%
Takedown defense
68%
0.4
Sub attempts / 15 min
1.5
Form & résumé
70%
UFC win rate
56%
+1
Win/loss streak
-2
60%
Last-5 win rate
60%
57%
Finish rate
80%
Recent opp. quality
105
Days since last fight
161
Recent form (last 5 UFC)
Macy Chiasson
  • WPannie KianzadSUB R1
    Close -2303mo before
  • LIrene AldanaKO/TKO R3
    Close +1511y 10mo before
  • WNorma DumontS-DEC R3
    opp missedClose +1842y 2mo before
  • LRaquel PenningtonSUB R2
    missedClose +1212y 6mo before
  • WMarion ReneauU-DEC R3
    Close -2363y 3mo before
Mayra Bueno Silva
  • LRaquel PenningtonU-DEC R5
    Close -1675mo before
  • WLina LansbergSUB R2
    Close -5271y 4mo before
  • WStephanie EggerSUB R1
    Close +1071y 11mo before
  • WWu YananU-DEC R3
    Close -5082y 2mo before
  • LManon FiorotU-DEC R3
    Close +2302y 8mo before
Chiasson — win / loss by method
Record: 9-3-0

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
2 wins, 1 loss
W
22% of wins
L
33% of losses
Submission
3 wins, 1 loss
W
33% of wins
L
33% of losses
Decision
4 wins, 1 loss
W
44% of wins
L
33% of losses
UFC
7win3loss0draw0NC
WinsLosses
2 (29%)KO/TKO(33%) 1
2 (29%)Submission(33%) 1
3 (43%)Decision(33%) 1
Non-UFC
2win0loss0draw0NC
WinsLosses
0 (0%)KO/TKO() 0
1 (50%)Submission() 0
1 (50%)Decision() 0
Bueno Silva — win / loss by method
Record: 10-3-1, 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
1 win, 0 losses
W
10% of wins
L
0% of losses
Submission
7 wins, 0 losses
W
70% of wins
L
0% of losses
Decision
2 wins, 3 losses
W
20% of wins
L
100% of losses
UFC
5win3loss1draw1NC
WinsLosses
0 (0%)KO/TKO(0%) 0
4 (80%)Submission(0%) 0
1 (20%)Decision(100%) 3
Non-UFC
5win0loss0draw0NC
WinsLosses
1 (20%)KO/TKO() 0
3 (60%)Submission() 0
1 (20%)Decision() 0

Profiles

Experience
Chiasson
Bueno Silva
10
UFC fights
10
100.7 min · 10.1 avg
Octagon time
109.1 min · 10.9 avg
8y 9m
Career length
11y 5m
UFC schedule strength

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

Chiasson
Bueno Silva
94W–44L · 68.1%
Overall
80W–35L · 69.6%
60W–26L · 69.8%
Wins
47W–23L · 67.1%
34W–18L · 65.4%
Losses
33W–12L · 73.3%
Non-UFC schedule strength
Chiasson
Bueno Silva
1W–0L · 100.0%
Overall
19W–1L · 95.0%
1W–0L · 100.0%
Wins
19W–1L · 95.0%
0W–0L
Losses
0W–0L
Distance striking
Chiasson
Bueno Silva
4.89
Landed / min
6.22
33.7%
Accuracy
50.9%
54.5%
Defense
60.0%
0.30
Knockdowns / 15 min
0.00
34.5%
Time at distance
42.0%
Grappling & control
Chiasson
Bueno Silva
2.38
Takedowns / 15 min
0.69
37.2%
Takedown accuracy
38.5%
62.5%
Takedown defense
67.6%
0.45
Sub attempts / 15 min
1.51
70.3%
Control share
29.7%
Strike target map
Chiasson
  • Head57%(204)div 63%
  • Body35%(125)div 21%
  • Legs8%(27)div 16%
Bueno Silva
  • Head48%(200)div 63%
  • Body32%(133)div 21%
  • Legs21%(87)div 16%

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

Macy Chiasson
CloseSSTDKDCtrl

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

Mayra Bueno Silva
CloseSSTDKDCtrl

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