UFC's debut at the Sphere in Las Vegas came about when Dana White and Tom Brady attended a U2 concert at the event space.
Appearing on FS1's TMZ Sports TV Show (starts at 2:24 mark), White credited Brady with inviting him to the concert as being the reason UFC 306 will take part at the new entertainment venue in Vegas.
The Sphere opened in September 2023 with a U2 concert. The legendary rock band had a 40-show residency at the venue that wrapped up on March 2.
UFC 306 will be the promotion's first Las Vegas-based event not held at UFC Apex or T-Mobile Arena since March 2023 when a Fight Night show headlined by Merab Dvalishvili and Petr Yan took place at the Theater at Virgin Hotels.