Fair play to him for giving it a go but given what has already happened to his family taking up another sport that may cause long term brain injury probably isn't wise.
I also assume this will be like the Flintoff thing where it's recorded for a TV show and he has a fight with some old pro who just wants a pay day.
It sounds ridiculous. I just hope he doesn't get hurt. He's an absolute star of his generation and if they put him in the ring with a youngster looking to make a name for himself it could get ugly.