UFC on ESPN 44: Holloway vs. Allen 2023 Synopsis - UFC on ESPN: Holloway vs. Allen (also known as UFC on ESPN 44) was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on April 15, 2023, at the T-Mobile Center in Kansas City, Missouri, United States. A featherweight bout between former UFC Featherweight Champion Max Holloway and Arnold Allen headlined the event.