UFC Fight Night 276: How to watch Allen vs. Costa, Vegas lineup, odds

Main event: Melquizael Costa

• Record: 26-7 MMA, 6-2 UFC
• Opponent: Arnold Allen (20-4 MMA, 11-3 UFC)
• Division: Featherweight
• Key wins: Morgan Charriere, Julian Erosa, Christian Rodriguez, Andre Fili, Shayilan Nuerdanbieke
• Misc.: Brazil’s Costa has made a quiet rise up the ranks at 145 pounds over the past two years. He went 4-0 in 2025 and started his 2026 with a bonus-winning knockout of Dan Ige and found himself ranked in the top 15 for the first time. Over his current six-fight winning streak, he has four stoppages and a pair of post-fight bonuses.

Co-main event: Dooho Choi

Dec 10, 2016; Toronto, ON, CAN; Cub Swanson (red gloves) fights Dooho Choi (blue gloves) during UFC 206 at Air Canada Centre. Mandatory Credit: Tom Szczerbowski-USA TODAY Sports

• Record: 16-4-1 MMA, 5-3-1 UFC
• Opponent: Daniel Santos (13-2 MMA, 4-1 UFC)
• Division: Featherweight
• Key wins: Nate Landwehr, Bill Algeo, Thiago Tavares, Sam Sicilia
• Misc.: “The Korean Superboy” is back for the first time in 18 months and will try to extend his modest two-fight winning streak on the heels of a knee injury that took him out of a scheduled return to the cage this past fall. Choi once had bonuses in five straight fights, though the last three of them were losses. Some of those were a decade ago, though, so Choi would be well served to remind people of what he can bring to the conversation.

Co-main event: Daniel Santos

• Record: 13-2 MMA, 4-1 UFC
• Opponent: Dooho Choi (16-4-1 MMA, 5-3-1 UFC) vs. Daniel Santos (13-2 MMA, 4-1 UFC)
• Division: Featherweight
• Key wins: Johnny Munoz Jr., John Castaneda
• Misc.: After he dropped his promotional debut, Santos has four straight wins. He’s also dealt with a bunch of his own injuries and pullouts and, this past fall, Choi’s withdrawal from their scheduled matchup. But now it’ll come to fruition, finally, as the co-feature, and Santos will do it trying to build on his second-round knockout of Joo Sang Yoo in a matchup he took after Choi’s pullout.

UFC debut: Juan Diaz

• Record: 15-1-1
• Opponent: Malcolm Wellmaker (10-1 MMA, 2-1 UFC)
• Division: Bantamweight
• Misc.: Diaz’s spinning back elbow knockout on DWCS this past October earned him a contract. Now the Entram Gym teammate of the likes of Michael Morales will make a promotional debut high on the show in a featured spot on the main card.

UFC debut: Thomas Gantt

• Record: 11-0
• Opponent: Trey Ogden (18-7 MMA, 3-3 UFC)
• Division: Lightweight
• Misc.: Gantt comes to the UFC by way of DWCS, where he submitted Adam Livingston midway through the first round this past September. The 33-year-old has 10 of his 11 wins by stoppage with an equal mix of knockouts and submissions.

UFC Fight Night 276 lineup

MAIN CARD (Paramount+, 8 p.m. ET)

• Arnold Allen vs. Melquizael Costa
• Dooho Choi vs. Daniel Santos
• Juan Diaz vs. Malcolm Wellmaker
• Rodolfo Bellato vs. Modestas Bukauskas
• Timmy Cuamba vs. Bernardo Sopaj

PRELIMINARY CARD (Paramount+, 5 p.m. ET)

• Nikolay Veretennikov vs. Khaos Williams
• Ivan Erslan vs. Tuco Tokkos
• Thomas Gantt vs. Trey Ogden
• Jacqueline Cavalcanti vs. Ketlen Vieira
• Cody Brundage vs. Andre Petroski
• Alice Ardelean vs. Polyana Viana
• Daniel Barez vs. Luis Gurule
• Shauna Bannon vs. Nicolle Caliari

UFC Fight Night 276 main card betting odds

• Allen -185, Costa +155
• Choi +105, Santos -125
• Diaz +210, Wellmaker -260
• Bellato +110, Bukauskas -130
• Cuamba +130, Sopaj -155

UFC Fight Night 276 preliminary card betting odds

• Veretennikov +105, Williams -125
• Erslan -180, Tokkos +150
• Gantt -230, Ogden +190
• Cavalcanti -175, Vieira +150
• Brundage +180, Petroski -220
• Ardelean -205, Viana +170
• Barez -110, Gurule -110
• Bannon +175, Caliari -210

This article originally appeared on MMA Junkie: UFC Fight Night 276: How to watch Allen vs. Costa, Vegas lineup, odds