Arnold Allen is set to face Melquizael Costa in the headline bout of UFC Fight Night on May 16, 2026, taking place at the Apex in Las Vegas. This featherweight clash will cap off the evening, with preliminary fights commencing at 6 p.m. ET and the main card beginning at 9 p.m. ET. Allen brings an impressive 20-4 professional record into the octagon, boasting 7 knockouts, 4 submissions, and 9 victories by decision. Costa, on the other hand, holds a 26-7 record, with 9 KOs and 8 submission wins.
UFC Fight Night: Arnold Allen vs. Melquizael Costa Betting Analysis
Initial betting lines opened with Arnold Allen as a -150 favorite and Melquizael Costa as a +130 underdog. These odds have since shifted, with Allen now generally ranging from -160 to -190 and Costa from +140 to +165 across various sportsbooks. Smart money appears to be backing Allen more heavily.
Specific betting markets offer further insight: Allen is priced between 1.67 and 2.50 to win by decision, with odds of 3.60 for a KO/TKO or submission victory. Costa’s odds for a decision win are between 3.00 and 4.50, and 4.33 for a finish. The market anticipates a fight that goes the distance, with odds for the bout to exceed 4.5 rounds trading between 1.57 and 1.67, while the under sits at 2.05-2.20. Prediction markets indicate a 59-60% probability of an Allen victory.
Allen’s experience against top-tier opponents, including notable performances against Max Holloway and Islam Makhachev despite recent losses, highlights his ability to compete at a high level. His nine-fight winning streak in the UFC prior to 2023 underscores his past dominance. Allen’s path to victory is often dictated by his consistent pace and striking volume. Costa’s underdog status can be attributed to Allen’s significant striking advantage; Allen lands an average of 3.47 significant strikes per minute compared to his opponents’ typically lower output. Betting on Allen to win in the later rounds (rounds 3-5) is priced between 17.00 and 23.00, reflecting a belief in his ability to control the fight as it progresses. For those seeking value on Costa, his odds for a decision victory at 4.50 might be appealing if he can implement a grinding strategy.
Statistically, Allen, a southpaw fighting out of England, stands at 5’8″ with a 70-inch reach. He averages 3.47 significant strikes landed per minute with 42% accuracy, while defending 60% of his opponent’s strikes. His takedown offense is moderate, averaging 0.86 per 15 minutes with 47% accuracy and a strong 71% takedown defense. Allen’s recent record includes a unanimous decision loss to Jean Silva on January 24, 2026, preceded by a victory over Giga Chikadze in July 2024. Prior to that, he secured notable wins, including a TKO against Calvin Kattar due to injury in 2022 and a knockout against Dan Hooker in the same year.
Costa, standing at 5’10”, tends to be involved in shorter fights, averaging 9:11 minutes per bout. He holds a 7-2 record within the UFC, with 2 KOs, 2 submissions, and 3 decision wins. While specific details on his most recent UFC victories are less prominent, Costa has demonstrated significant finishing ability throughout his career.
From a betting perspective, this matchup presents a classic scenario of a seasoned favorite against a dangerous underdog. Allen’s extensive resume and five-round experience are weighed against Costa’s higher-risk, higher-reward fighting style. Allen’s strengthening moneyline reflects his proven durability and consistent output over longer fight durations. Betting on Allen by decision and the fight exceeding 4.5 rounds appear to be the most logical avenues for bettors who anticipate Allen’s experience and consistent pace to prevail.
However, Costa’s proven finishing capability and tendency for shorter fights offer genuine upset potential, particularly in the early stages. His odds for a knockout or decision victory will attract bettors who are drawn to higher volatility. As fight week progresses, the prevailing market sentiment suggests that Allen will reassert his position in the featherweight division with a controlled, scorecard-driven victory. Nevertheless, the odds still offer a margin for those who believe Costa can turn the main event into a chaotic affair that could upset more conservative betting strategies.
English Translation:
Arnold Allen faces Melquizael Costa in the main event at UFC Fight Night on May 16, 2026, at the Apex in Las Vegas. The featherweight bout headlines the card, with prelims starting at 6 p.m. ET and main card at 9 p.m. ET. Allen enters with a 20-4 record, including 7 KOs, 4 submissions, and 9 decisions. Costa carries a 26-7 mark, with 9 KOs and 8 submissions.
Arnold Allen vs Melquizael Costa Odds
Odds opened with Allen at -150 and Costa at +130. Lines shifted to favor Allen more, now at -160 to -190 for Allen and +140 to +165 for Costa across books. Specific method bets list Allen by points at 1.67-2.50, KO/TKO or sub at 3.60, and Costa by points at 3.00-4.50 or finish at 4.33. Fight distance over 4.5 rounds trades at 1.57-1.67, under at 2.05-2.20. Prediction markets give Allen a 59-60% win probability.
Allen holds the edge in experience against top-15 foes, outstriking Holloway and Evloev despite losses. His path to victory leans towards controlling the pace. He won nine straight UFC bouts before 2023 setbacks, rebounding with a win over Chikadze. Costa’s underdog price reflects Allen’s striking advantage: 3.47 landed vs. opponents’ lower output. Round props favor Allen late, at 17.00-23.00 for rounds 3-5. Costa by decision at 4.50 offers value if he grinds. Total volume projects 140-160 significant strikes combined.
Allen, a southpaw from England at 5’8″ with a 70-inch reach, lands 3.47 significant strikes per minute at 42% accuracy and defends 60% of strikes. His takedown average sits at 0.86 per 15 minutes with 47% accuracy and 71% defense. Recent form shows a unanimous decision loss to Jean Silva on Jan. 24, 2026, after a win over Giga Chikadze in July 2024. He stopped Calvin Kattar via knee injury in 2022 and Dan Hooker with punches that year. Costa, at 5’10”, averages shorter fights at 9:11, with a 7-2 UFC record: 2 KOs, 2 subs, 3 decisions. Details on his latest UFC wins remain sparse, but he has shown finishing power.
In betting terms, this matchup sets up as a classic “trusted favorite versus live underdog” spot, with Allen’s deeper resume and five-round seasoning stacked against Costa’s higher-risk, higher-reward style. Allen’s growing moneyline edge lines up with his proven durability and output over 25 minutes, making the decision props and over 4.5 rounds the clearest angles for bettors who expect his pace and experience to tell over time.
Costa’s finishing clip and shorter average fight time still give him upset potential, especially early, so his KO or decision prices will appeal to those chasing volatility rather than stability. As the week closes, the market expects Allen to reassert himself in the featherweight mix with a steady, scorecard-driven win, but the odds leave just enough daylight for anyone who believes Costa can turn this main event into the kind of chaotic fight that punishes conservative tickets.