Mark Zuckerberg is taking his MMA obsession to another level by building an octagon in his backyard. But his wife, Priscilla Chan, didn't appear to be too happy in a WhatsApp conversation he shared.

Belal Muhammad entered the Octagon long before he ever became UFC Champion. Tonight, the streaking welterweight king returns in the main event of UFC 315. Moving on from a failed booking with an ...

Trump, the octagon and the nation's birthday: How did they all end up in the cage together? The president recently announced he plans to host a UFC match at the White House. But his affair with ...