Arnold Allen and Melquizael Costa successfully completed their official weigh-ins in Las Vegas on May 15, 2026 [4].

The results ensure both athletes are cleared to compete in the main event of UFC Vegas 117, also known as UFC Fight Night 276. Because this is a non-title featherweight bout, the fighters must adhere to the 145-pound limit to avoid penalties or the cancellation of the fight.

Arnold Allen stepped on the scale at 145 pounds [2]. This weight is one pound under the non-title limit [2]. Allen's ability to hit the mark precisely allows him to enter the cage without the complications of a missed weight cut, a common hurdle in the featherweight division.

Melquizael Costa recorded a weigh-in weight of 145.5 pounds [1]. Both fighters and the rest of the athletes on the card stepped on the scale to confirm their eligibility for the event [1]. The weigh-in process serves as the final regulatory hurdle before the physical combat begins.

The event is scheduled to take place on May 16, 2026 [3], in Las Vegas, Nevada. The city, often referred to as "Sin City," serves as the primary hub for the promotion's fight nights and major pay-per-view events.

Following the weigh-ins, the contenders participated in the official face-off. This ritual provides a final look at the physical condition of the athletes before they begin the rehydration process. The official results from the scale confirm that the main event will proceed as planned tomorrow.

“Arnold Allen stepped on the scale at 145 pounds.”

The successful weigh-ins for Allen and Costa remove the primary administrative risk for the main event. In mixed martial arts, missing weight can lead to significant purse deductions or the fight being changed to a catchweight bout, which often alters the competitive dynamics. By hitting the limit, both fighters maintain their standing in the featherweight rankings and ensure the bout remains a standard divisional contest.