UFC on ESPN 31: Font vs. Aldo: UFC on ESPN 31: Font vs. Vera was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on April 30, 2022, at the UFC Apex facility in Enterprise, Nevada, part of the Las Vegas Metropolitan Area, United States. A bantamweight bout between Rob Font and Marlon Vera headlined the event. At the weigh-ins, Font weighed in at 138.5 pounds, two and half pounds over the division non-title fight limit. The bout proceeded at a catch-weight with Font forfeiting 20% of his purse to Vera.