Well his agent isn't with the UFC.
But that said, who would trace it?
And how could you legally?
He's claiming someone sent him a racist text. Unless he sends that to authorities to investigate as some sort of crime, it would be illegal for anyone else to dig through his personal communications to find out. If it was reported as an actual crime and they find it was a number tied to him he could be in trouble.
Hypothetically, if he did send it to himself, perhaps he covered his tracks and made it hard to trace. But generally it's pretty easy to trace an ip even if someone uses a vpn and anonymous wifi at an internet cafe, unless they spoof their mac address and use all default settings on something like tails and have the most common laptop/phone in the world and only use that laptop for creating that email address... but even then, google's sign up process would require them to leave a trail of breadcrumbs. And it would be suspect that phone number wasn't used for anything else--but if it was used for other purposes that would give away it's nefarious creation. It's possible to be anonymous on the internet but it would kinda require you to have no life and be anonymous in the real world, which is incredibly difficult. I'm not saying those people don't exist but they would usually have some sort of training and financial backing. So either independently wealthy from inherited money or illegal enterprise or perhaps state sponsored, the point is those people would have people who know and protect them. And we are talking about an MMA fighter's manager claiming someone said something racist to him. I mean racism has existed for 1000s of years and is incredibly prevalent around the world even to this day... What would be the point of going too all that effort? That all said, I guess it could be done with an incredibly complex decision tree based ai-program running on virtual machines in multiple locations, perhaps? IDK. I don't think true anonymity is really possible in the ways people think. Someone knows. There are just legal, ethical, and political restrictions that prevent chasing down the leads.
It's probably real. People are assholes. I was just pointing out it's weird they scratched out the number and stuff like that should raise questions about authenticity enough to not take something as fact that can't be independently verified.