Yes, it had crossed my mind that it could be that. As I'm sure you are aware It's a common practice of East Asian students in Western universities, but they usually pick their own names.
Andrew "Freddie" Flintoff is an example of someone more known by a nickname given to them, it is a play on his name's resemblance to Fred Flintsone. Not insulting or offensive but if he felt it was demeaning and not serious and had asked not to be called it all those years ago, I would hope people would have been polite enough to respect his wishes.
However, these considerations are all irrelevant, because Jack Brooks has already admitted using the name in the alleged context and apologised for it.
Coincidentally, I was walking past the stadium today and saw a TV van (with satellite transmitter) and camera man setting up and assumed it was something to do with this.