UFC on ESPN: Perez vs. Taira (also known as UFC on ESPN 58 and UFC Vegas 93) was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on June 15, 2024, at the UFC Apex facility, in Enterprise, Nevada, part of the Las Vegas Metropolitan Area, United States.
This was the 100th event the promotion hosted at the UFC Apex. The UFC started hosting events at the venue in due to the COVID-19 pandemic, originally behind closed doors, before changing their approach to a limited set of tickets per event in .
A flyweight bout between former UFC Flyweight Championship challenger Alex Perez and Tatsuro Taira headlined the event. Perez had originally been scheduled to face Tagir Ulanbekov, but he was pulled from that matchup to serve as a replacement and headline in April. On April 30, it was reported that the bout between Perez and Ulanbekov had been rebooked for this event. Taira, meanwhile, had been slated to step in as a replacement at UFC 302 two weeks earlier against Joshua Van before being moved to the main event here.
After Perez was shifted into the headliner role, the promotion instead paired Ulanbekov with Van, who had briefly been linked as Taira's opponent at UFC 302. However, the bout was cancelled when Ulanbekov weighed in at 129.5 pounds, three and a half pounds over the flyweight non-title fight limit.
A women's strawweight bout between former LFA Women's Strawweight Champion Julia Polastri and Josefine Lindgren Knutsson took place at the event. They were originally scheduled for but the bout was scrapped when Knutsson pulled out due to injury.
A heavyweight bout between former UFC Heavyweight Champion Andrei Arlovski and Martin Buday was scheduled for this event. However, the bout was moved to UFC 303 for unknown reasons.
A middleweight bout between André Muniz and Ikram Aliskerov was expected to take place at the event. However, Muniz withdrew due to a foot injury. He was replaced by Antonio Trócoli. In turn, the bout was scrapped during fight week as Aliskerov was pulled in order to serve as a replacement for Khamzat Chimaev against Robert Whittaker a week later in the main event of .
The following fighters received $50,000 bonuses.