As always with balls(or any clickbait site) it's from a report on another site, this time it's on si.com
Which mentions that it comes from Chelsea fan and podcaster Simon Phillips(as noted by JR89), linking to his twitter
Nothing on his twitter about it, but he does have links to his substack account in his bio
Clicking the search button and entering Bazunu results in this article from two days ago
https://siphillipstalkschelsea.subst...saints-stopper
And this one, when he first reported the interest in Bazunu, from October
https://siphillipstalkschelsea.subst...-and-mckennie/
So, I'd take it with a pinch of salt.