Arnold Allen vs Melquizael Costa headlines May 16 Vegas card

A pivotal featherweight clash between Arnold Allen and Melquizael Costa is set to headline the UFC Fight Night card on May 16, 2026, in Las Vegas. According to the updated CBS Sports schedule, the bout tops the first event following UFC 328 and will air on Paramount+. Allen remains a fixture near the top of the division and is looking to reassert himself in the title picture, while Costa aims to break through with a signature main‑event performance. The winner will likely position themselves for a top‑contender matchup later in the year, making this a key bout for the 145‑pound landscape.