Arnold Allen is set to headline UFC Fight Night against Melquizael Costa on May 16, 2026, at the Apex in Las Vegas. The featherweight clash will be the main event, with preliminary bouts commencing at 6 p.m. ET and the main card at 9 p.m. ET.
Allen enters the octagon with a professional record of 20 wins and 4 losses, boasting 7 knockout victories, 4 submission wins, and 9 decisions. Costa, on the other hand, holds a formidable 26-7 record, with 9 knockouts and 8 submissions to his name.
Betting Odds and Predictions
Initial betting lines opened with Arnold Allen as the favorite at -150, with Melquizael Costa as the underdog at +130. The odds have since shifted, with Allen’s line moving to -160 to -190 and Costa’s odds ranging from +140 to +165 across various sportsbooks.
Method bets suggest Allen is more likely to win by decision (1.67-2.50) than by knockout/technical knockout or submission (3.60). For Costa, the odds for a decision win are between 3.00-4.50, and a finish is priced at 4.33.
The total rounds prop bets indicate a preference for the fight going the distance, with odds for over 4.5 rounds at 1.57-1.67, and under 4.5 rounds at 2.05-2.20. Prediction markets give Allen a 59-60% probability of winning.
Fighter Analysis
Arnold Allen, a southpaw from England, stands at 5’8″ with a 70-inch reach. He averages 3.47 significant strikes landed per minute with 42% accuracy and a 60% strike defense. His takedown average is 0.86 per 15 minutes, with a 47% accuracy and 71% takedown defense.
Allen’s recent form includes a unanimous decision loss to Jean Silva on January 24, 2026, preceded by a victory over Giga Chikadze in July 2024. His prior notable wins include stoppages against Calvin Kattar (due to injury) and Dan Hooker (by punches) in 2022.
Melquizael Costa, standing at 5’10”, tends to have shorter fights, with an average bout duration of 9:11. His UFC record is 7-2, comprising 2 KOs, 2 submissions, and 3 decisions. While specific details of his recent UFC wins are less readily available, Costa has demonstrated significant finishing ability.
Betting Angles
The matchup is characterized as a clash between a proven contender and a dangerous underdog. Allen’s extensive experience against top-tier opposition and his ability to go the distance are contrasted with Costa’s higher-risk, higher-reward fighting style and finishing prowess.
The betting market’s increasing favor towards Allen suggests a belief in his durability and consistent output over a 25-minute fight. Bettors favoring Allen’s path to victory might consider the decision props and the over 4.5 rounds market, anticipating his pace and experience to prevail.
However, Costa’s finishing rate and shorter fight averages present an upset potential, particularly in the early rounds. Those seeking volatility may find value in Costa’s odds for a knockout or submission. As the week progresses, the prevailing sentiment is that Allen will secure a methodical, points-based victory to re-establish himself in the featherweight division. Nevertheless, the odds still offer an opening for those who believe Costa can force a more chaotic and punishing fight.
