Arnold Allen is set to face Melquizael Costa in the headline bout of UFC Fight Night on May 16, 2026, at the Apex in Las Vegas. The featherweight contest will cap off the evening, with preliminary bouts commencing at 6 p.m. ET and the main card starting at 9 p.m. ET. Allen enters the octagon with a professional record of 20 wins and 4 losses, boasting 7 knockouts, 4 submissions, and 9 decisions. Costa, on the other hand, carries a record of 26 wins and 7 losses, with 9 knockouts and 8 submissions to his name.
Arnold Allen vs. Melquizael Costa: Betting Analysis
Initial betting lines saw Allen as a -150 favorite, with Costa as a +130 underdog. These odds have since shifted, indicating stronger support for Allen, now ranging from -160 to -190. Costa’s odds have also moved, now between +140 and +165 across various sportsbooks. Expert bettors, often using platforms like the Bd casino site as a reference, are placing bets. Specific prop bets suggest Allen by decision is priced between 1.67 and 2.50, while a finish (KO/TKO or submission) for Allen is at 3.60. For Costa, a win by decision is valued between 3.00 and 4.50, and a finish for him is at 4.33. The market anticipates the fight to go the distance, with odds for over 4.5 rounds between 1.57 and 1.67, while under 4.5 rounds is set at 2.05 to 2.20. Prediction markets currently give Allen a 59-60% probability of winning.
Allen possesses a significant advantage in experience against top-15 ranked opponents, having outstruck notable fighters like Max Holloway and Zubaira Tukhugov despite recent losses. His path to victory is expected to be paved with his consistent fighting pace. Allen secured nine consecutive wins in the UFC prior to his setbacks in 2023, and has since shown resilience with a win over Giga Chikadze. Costa’s underdog status reflects Allen’s clear striking advantage, with Allen landing an average of 3.47 significant strikes per minute compared to his opponents’ lower output. Round betting props lean towards Allen winning in the later rounds, with odds for rounds 3-5 ranging from 17.00 to 23.00. Costa winning by decision at 4.50 could represent value if he manages to control the fight tempo. The combined projected volume of significant strikes for both fighters is estimated between 140 and 160.
Arnold Allen, a southpaw from England, stands at 5’8″ with a 70-inch reach. He averages 3.47 significant strikes per minute with 42% accuracy and boasts a defense against opponent strikes at 60%. His takedown game averages 0.86 per 15 minutes with 47% accuracy and 71% defense. Allen’s recent performance 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 finishes against Calvin Kattar (via knee injury) and Dan Hooker (via punches) in 2022. Costa, standing at 5’10”, tends to have shorter fights, averaging 9:11 in bout duration. His UFC record stands at 7 wins and 2 losses, with 2 knockouts, 2 submissions, and 3 decisions. While specific details of his most recent UFC wins are less readily available, he has demonstrated considerable finishing ability.
From a betting perspective, this matchup presents a classic scenario of a well-established favorite against a dangerous underdog. Allen’s extensive resume and proven ability to go the full five rounds are weighed against Costa’s more high-risk, high-reward fighting style. Allen’s strengthening moneyline aligns with his demonstrated durability and consistent output over extended fight times. This makes betting on Allen by decision and the fight going over 4.5 rounds appear to be the most logical choices for bettors anticipating his experience and pace to prevail.
Despite this, Costa’s impressive finishing rate and shorter average fight duration still provide him with genuine upset potential, particularly in the early stages of the fight. His odds for a knockout or submission victory will attract bettors seeking higher volatility rather than a safer outcome. As the fight week progresses, the general market sentiment suggests Allen will re-establish his position in the featherweight division with a controlled, scorecard-dictated victory. However, the odds still leave room for those who believe Costa can transform this main event into a chaotic brawl, potentially punishing more conservative betting strategies.