Juan Diaz defeated Malcolm Wellmaker by choke submission on Saturday, May 16, 2026 [1], during the UFC Vegas 117 event.

The victory marks a successful debut for Diaz, who entered the promotion as a newcomer. His ability to secure a finish against a seasoned opponent establishes him as a competitive force within the organization's roster.

The bout took place at the Meta Apex arena in Las Vegas, Nevada [2]. Diaz managed to overcome Wellmaker by applying a choke that forced the submission [3]. Following the fight, Diaz said in an Octagon interview with Daniel Cormier that he applied pressure to secure the win.

Before joining the UFC, Diaz held a professional mixed martial arts record of 15-1-1 [4]. He entered the promotion with a 0-0 UFC record [4], making this win a critical first step in his career with the league.

Wellmaker suffered a loss in the contest, continuing a difficult stretch in his professional career [1]. The match highlighted the gap in momentum between the two fighters as Diaz utilized his grappling to dominate the closing moments of the fight.

Juan Diaz defeated Malcolm Wellmaker by choke submission

This result validates Juan Diaz's transition from the regional circuit to the global stage of the UFC. By securing a finish in his debut, Diaz avoids the uncertainty of a judges' decision and immediately increases his value to the promotion, while Wellmaker faces increasing pressure to adjust his game plan to avoid further losses.