The Ultimate Fight Fan
+ Log a bet
UFC Fight Night: Allen vs. Costa
Arnold Allen
Arnold Allen
20-4 · GBR
VS
Melquizael Costa
Melquizael Costa
26-7 · BRA
May 16, 2026 · Las Vegas, Nevada, USA
Featherweight · 5 rounds · Main event
145.0lb
Weigh-in
145.5lb
Arnold Allen def. Melquizael Costa by U-DEC, R5 5:00
Performance
Round by round
SSTDKDCtrl
R1
Allen9/92/211:44
Costa10/140/201:45
R2
Allen23/380/000:36
Costa26/780/000:00
R3
Allen32/520/001:22
Costa30/710/100:00
R4
Allen23/361/101:43
Costa23/630/000:00
R5
Allen11/174/404:03
Costa11/280/100:00
Total
Allen98/1527/719:28
Costa100/2540/401:45

Scorecards

Allen vs Costa

RdDavid LethabyEric ColónSal D'AmatoCommunity
R110-910-910-910-9
R210-910-99-109.8-9.2
R310-910-910-910-9
R410-910-910-910-9
R510-910-910-910-9
Total50-4550-4549-4649.8-45.2

Media (10 cards) · avg 49.645.4 · 10 Allen · 0 Costa

Official cards + public consensus via MMA Decisions. Per round: Allen-Costa.

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
AllenWin probabilityCosta
37.2%62.8%
KO / TKO
27%
Submission
24%
Decision
49%
Expected fight time: 16.9 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 Allen, blue toward Costa. Tap a bar for why.

Predicted outcomes
Allen37%
Wins by
Model
Equity
Mkt
KO / TKO9%26%
Submission7%19%
Decision21%55%
Predicted output
Sig. strikes51 (2170)act 98
Takedowns1.0 (0.03.5)act 7
Costa63%
Wins by
Model
Equity
Mkt
KO / TKO18%29%
Submission17%26%
Decision28%45%
Predicted output
Sig. strikes58 (2479)act 100
Takedowns0.8 (0.03.0)act 0
Combined totals~110 sig strikes~1.7 takedownsmkt —
How it ends
mkt —
R117%
R216%
R39%
R45%
R54%
Distance49%
Fighter props
Most sig. strikestie 0.9%
Allen
45.2%+119
Costa
-11953.9%
Most takedownstie 37.4%
Allen
35.1%-128
Costa
+12827.5%
Significant strikes — over/under
Allen
Expected: 51.5
51.5
Over 51.5
39.7%
+152
Under 51.5
60.3%
-152
065129
Costa
Expected: 58.4
58.5
Over 58.5
39.7%
+152
Under 58.5
60.3%
-152
074147
Takedowns — over/under
Allen
Expected: 1.0
1
Over 1
31.2%
+175
Exactly 1
14.0%
push
Under 1
54.8%
-175
035
Costa
Expected: 0.8
1
Over 1
25.6%
+241
Exactly 1
12.7%
push
Under 1
61.7%
-241
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 16.9 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
Allen37.2%53.2%−16.0-125
Costa62.8%46.8%+16.0+105

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
66.3Striking71.2
Costa +4.8
49.8Grappling58.4
Costa +8.6
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
AllenCosta
Tale of the tape
Ratings (Elo)
1634
Pound-for-pound
1613
1630
Divisional
1633
1500
Striking offense
1517
1530
Striking defense
1517
1503
Grappling offense
1522
1523
Grappling defense
1484
Physical
32 yrs
Age
29 yrs
5'8"
Height
5'10"
70"
Reach
71"
Southpaw
Stance
Southpaw
Striking (UFC career)
3.47
Strikes landed / min
4.38
42%
Strike accuracy
50%
3.04
Strikes absorbed / min
2.97
60%
Strike defense
55%
Grappling (UFC career)
0.86
Takedowns / 15 min
2.00
48%
Takedown accuracy
41%
72%
Takedown defense
59%
0.3
Sub attempts / 15 min
1.1
Form & résumé
79%
UFC win rate
78%
-1
Win/loss streak
+6
40%
Last-5 win rate
100%
36%
Finish rate
57%
Recent opp. quality
112
Days since last fight
84
Recent form (last 5 UFC)
Arnold Allen
  • LJean SilvaU-DEC R3
    Close +1844mo before
  • WGiga ChikadzeU-DEC R3
    Close -2711y 10mo before
  • LMovsar EvloevU-DEC R3
    Close +1652y 4mo before
  • LMax HollowayU-DEC R5
    Close +1433y 1mo before
  • WCalvin KattarKO/TKO R2
    Close -1223y 7mo before
Melquizael Costa
  • WDan IgeKO/TKO R1
    Close -2483mo before
  • WMorgan CharriereKO/TKO R1
    Close -1605mo before
  • WJulian ErosaU-DEC R3
    Close -1641y before
  • WChristian RodriguezU-DEC R3
    Close +1681y 2mo before
  • WAndre FiliSUB R1
    Close -1351y 3mo before
Allen — win / loss by method
Record: 20-4-0

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
7 wins, 0 losses
W
35% of wins
L
0% of losses
Submission
4 wins, 0 losses
W
20% of wins
L
0% of losses
Decision
9 wins, 4 losses
W
45% of wins
L
100% of losses
UFC
11win3loss0draw0NC
WinsLosses
2 (18%)KO/TKO(0%) 0
2 (18%)Submission(0%) 0
7 (64%)Decision(100%) 3
Non-UFC
9win1loss0draw0NC
WinsLosses
5 (56%)KO/TKO(0%) 0
2 (22%)Submission(0%) 0
2 (22%)Decision(100%) 1
Costa — win / loss by method
Record: 26-7-0

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, 2 losses
W
35% of wins
L
29% of losses
Submission
8 wins, 2 losses
W
31% of wins
L
29% of losses
Decision
9 wins, 3 losses
W
35% of wins
L
43% of losses
UFC
7win2loss0draw0NC
WinsLosses
2 (29%)KO/TKO(50%) 1
2 (29%)Submission(50%) 1
3 (43%)Decision(0%) 0
Non-UFC
19win5loss0draw0NC
WinsLosses
7 (37%)KO/TKO(20%) 1
6 (32%)Submission(20%) 1
6 (32%)Decision(60%) 3

Profiles

Experience
Allen
Costa
14
UFC fights
9
192.1 min · 13.7 avg
Octagon time
82.6 min · 9.2 avg
14y 4m
Career length
12y 5m
UFC schedule strength

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

Allen
Costa
254W–72L · 77.9%
Overall
186W–70L · 72.7%
198W–62L · 76.2%
Wins
156W–59L · 72.6%
56W–10L · 84.8%
Losses
30W–11L · 73.2%
Non-UFC schedule strength
Allen
Costa
58W–26L · 69.0%
Overall
164W–84L · 66.1%
51W–24L · 68.0%
Wins
116W–74L · 61.1%
7W–2L · 77.8%
Losses
48W–10L · 82.8%
Distance striking
Allen
Costa
4.40
Landed / min
7.54
40.8%
Accuracy
46.3%
62.1%
Defense
62.2%
0.23
Knockdowns / 15 min
0.36
71.3%
Time at distance
45.8%
Grappling & control
Allen
Costa
0.86
Takedowns / 15 min
2.00
47.8%
Takedown accuracy
40.7%
71.6%
Takedown defense
58.7%
0.31
Sub attempts / 15 min
1.09
45.8%
Control share
39.4%
Strike target map
Allen
  • Head72%(481)div 63%
  • Body20%(132)div 20%
  • Legs8%(54)div 16%
Costa
  • Head47%(169)div 63%
  • Body33%(118)div 20%
  • Legs21%(75)div 16%

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

Arnold Allen
CloseSSTDKDCtrl

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

Melquizael Costa
CloseSSTDKDCtrl

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