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UFC Fight Night: Smith vs. Spann
Joaquin Buckley
Joaquin Buckley
12-4 · USA
VS
Antonio Arroyo
Antonio Arroyo
9-4 · BRA
September 18, 2021 · Las Vegas, Nevada, USA
Middleweight · 3 rounds
184.5lb
Weigh-in
186.0lb
Joaquin Buckley def. Antonio Arroyo by KO/TKO (Punches), R3 2:26
Performance
Round by round
SSTDKDCtrl
R1
Buckley15/441/300:08
Arroyo6/180/000:02
R2
Buckley12/310/200:55
Arroyo10/180/000:08
R3 · 2:26
Buckley14/270/110:15
Arroyo5/100/000:14
Total
Buckley41/1021/611:18
Arroyo21/460/000:24

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
BuckleyWin probabilityArroyo
58.9%41.1%
KO / TKO
33%
Submission
18%
Decision
49%
Expected fight time: 10.3 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 Buckley, blue toward Arroyo. Tap a bar for why.

Predicted outcomes
Buckley59%
Wins by
Model
Equity
Mkt
KO / TKO23%39%42%
Submission6%11%6%
Decision30%50%15%
Predicted output
Sig. strikes38 (1551)act 41
Takedowns1.2 (0.03.9)act 1
Arroyo41%
Wins by
Model
Equity
Mkt
KO / TKO10%25%15%
Submission12%29%12%
Decision19%46%11%
Predicted output
Sig. strikes40 (1755)act 21
Takedowns0.6 (0.02.6)act 0
Combined totals~78 sig strikes~1.8 takedownsmkt —
How it ends
mkt —
R124%
R220%
R37%
Distance49%
Fighter props
Most sig. strikestie 1.2%
Buckley
47.2%+109
Arroyo
-10951.6%
Most takedownstie 34.9%
Buckley
39.7%-156
Arroyo
+15625.4%
Significant strikes — over/under
Buckley
Expected: 37.8
38
Over 38
38.9%
+154
Exactly 38
1.3%
push
Under 38
59.9%
-154
04895
Arroyo
Expected: 40.2
40
Over 40
39.4%
+151
Exactly 40
1.2%
push
Under 40
59.4%
-151
051101
Takedowns — over/under
Buckley
Expected: 1.2
1
Over 1
35.4%
+142
Exactly 1
14.5%
push
Under 1
50.2%
-142
035
Arroyo
Expected: 0.6
0.5
Over 0.5
38.7%
+159
Under 0.5
61.3%
-159
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 10.3 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
Buckley58.9%63.4%−4.5-195
Arroyo41.1%36.6%+4.5+162
By method
Buckley by KO/TKO19.7%41.6%−21.9-103
Buckley by submission10.5%5.6%+4.9+1358
Buckley by decision28.7%15.3%+13.4+437
Arroyo by KO/TKO13.7%14.6%−0.9+464
Arroyo by submission7.3%12.4%−5.1+562
Arroyo by decision20.0%10.5%+9.5+680
Total rounds (over)
Over 1.5 rds75.3%52.0%+23.3-125
Over 2.5 rds55.6%34.9%+20.7+167
Goes the distance
Fight goes to decision48.7%28.6%+20.1+230

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
54.9Striking71.9
Arroyo +17.0
35.6Grappling37.2
Arroyo +1.6
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
BuckleyArroyo
Tale of the tape
Ratings (Elo)
1530
Pound-for-pound
1488
1529
Divisional
1504
1507
Striking offense
1503
1485
Striking defense
1502
1488
Grappling offense
1495
1518
Grappling defense
1491
Physical
27 yrs
Age
32 yrs
5'10"
Height
6'3"
76"
Reach
73"
Southpaw
Stance
Orthodox
Striking (UFC career)
4.58
Strikes landed / min
2.47
36%
Strike accuracy
68%
5.46
Strikes absorbed / min
1.40
52%
Strike defense
48%
Grappling (UFC career)
0.60
Takedowns / 15 min
0.50
17%
Takedown accuracy
100%
100%
Takedown defense
35%
0.0
Sub attempts / 15 min
0.0
Form & résumé
50%
UFC win rate
0%
-1
Win/loss streak
-2
50%
Last-5 win rate
0%
100%
Finish rate
Recent opp. quality
245
Days since last fight
273
Recent form (last 5 UFC)
Joaquin Buckley
  • LAlessio Di ChiricoKO/TKO R1
    Close -3038mo before
  • WJordan WrightKO/TKO R2
    Close -26510mo before
  • WImpa KasanganayKO/TKO R2
    Close +20011mo before
  • LKevin HollandKO/TKO R3
    Close +3331y 1mo before
Antonio Arroyo
  • LDeron WinnU-DEC R3
    Close -1859mo before
  • LAndre MunizU-DEC R3
    Close +1051y 10mo before
Buckley — win / loss by method
Record: 12-4-0

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
9 wins, 3 losses
W
75% of wins
L
75% of losses
Submission
0 wins, 0 losses
W
0% of wins
L
0% of losses
Decision
3 wins, 1 loss
W
25% of wins
L
25% of losses
UFC
2win2loss0draw0NC
WinsLosses
2 (100%)KO/TKO(100%) 2
0 (0%)Submission(0%) 0
0 (0%)Decision(0%) 0
Non-UFC
10win2loss0draw0NC
WinsLosses
7 (70%)KO/TKO(50%) 1
0 (0%)Submission(0%) 0
3 (30%)Decision(50%) 1
Arroyo — win / loss by method
Record: 9-4-0

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
44% of wins
L
0% of losses
Submission
4 wins, 2 losses
W
44% of wins
L
50% of losses
Decision
1 win, 2 losses
W
11% of wins
L
50% of losses
UFC
0win2loss0draw0NC
WinsLosses
0 ()KO/TKO(0%) 0
0 ()Submission(0%) 0
0 ()Decision(100%) 2
Non-UFC
9win2loss0draw0NC
WinsLosses
4 (44%)KO/TKO(0%) 0
4 (44%)Submission(100%) 2
1 (11%)Decision(0%) 0

Profiles

Experience
Buckley
Arroyo
4
UFC fights
2
25.1 min · 6.3 avg
Octagon time
30.0 min · 15.0 avg
11y 10m
Career length
12y 0m
UFC schedule strength

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

Buckley
Arroyo
48W–10L · 82.8%
Overall
24W–6L · 80.0%
19W–0L · 100.0%
Wins
0W–0L
29W–10L · 74.4%
Losses
24W–6L · 80.0%
Non-UFC schedule strength
Buckley
Arroyo
74W–24L · 75.5%
Overall
41W–16L · 71.9%
61W–24L · 71.8%
Wins
36W–16L · 69.2%
13W–0L · 100.0%
Losses
5W–0L · 100.0%
Distance striking
Buckley
Arroyo
4.54
Landed / min
6.75
32.8%
Accuracy
66.7%
53.6%
Defense
49.3%
1.79
Knockdowns / 15 min
0.00
82.6%
Time at distance
31.6%
Grappling & control
Buckley
Arroyo
0.60
Takedowns / 15 min
0.50
16.7%
Takedown accuracy
100.0%
100.0%
Takedown defense
34.8%
0.00
Sub attempts / 15 min
0.00
92.5%
Control share
27.0%
Strike target map
Buckley
  • Head50%(58)div 64%
  • Body43%(49)div 19%
  • Legs7%(8)div 17%
Arroyo
  • Head66%(49)div 64%
  • Body22%(16)div 19%
  • Legs12%(9)div 17%

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

Joaquin Buckley
CloseSSTDKDCtrl

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

Antonio Arroyo
CloseSSTDKDCtrl

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