The UFC Vegas 117: Allen vs. Costa weigh-in took place on Friday at the Meta Apex in Las Vegas.

The event is headlined by a featherweight bout between No. 7 ranked Arnold Allen (20-4) and No. 12 ranked Melquizael Costa (26-7). Allen will enter the bout needing a win to hang onto his ranking having lost three of his last four fights. Costa brings with him a six-fight winning streak.

Both men tipped the scales at 145.5 pounds.

Almighty @Arnoldbfa💪

He weighs in at 145.5 lbs

[ #UFCVegas117 | MAY 16 at 8pmET on @ParamountPlus ] pic.twitter.com/hyNEpJL60m

— UFC (@ufc) May 15, 2026

Lookin’ to extend the win streak 😎@MelkCostaCauthy | 145.5 lbs

[ #UFCVegas117 | MAY 16 at 8pmET on @ParamountPlus ] pic.twitter.com/5FFtDIyDqT

— UFC (@ufc) May 15, 2026

UFC Vegas 117 Official Weigh-In Results

• Arnold Allen (145) vs. Melquizael Costa (145.5)
• Dooho Choi (146) vs. Daniel Santos (145)
• Juan Diaz (135.5) vs. Malcolm Wellmaker (135.5)
• Modestas Bukauskas (213.5) vs. Christian Edwards (214.5)
• Timmy Cuamba (136) vs. Bernardo Sopaj (136)

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

• Nikolay Veretennikov (170.5) vs. Khaos Williams (170.5)
• Ivan Erslan (205.5) vs. Tuco Tokkos (205.5)
• Thomas Gantt (156) vs. Trey Ogden (155)
• Jacqueline Cavalcanti (135.5) vs. Ketlen Vieira (136)
• Cody Brundage (185.5) vs. Andre Petroski (185.5)
• Alice Ardelean (116) vs. Polyana Viana (115)
• Daniel Barez (125.5) vs. Luis Gurule (125.5)
• Shauna Bannon (115.5) vs. Nicolle Caliari (115)