I thought he came out of retirement and signed with Rizin? He had one fight and that was a boxing match with one arm strapped to his body which he won against some irrelevant guy.
He could beat Cain if he wanted; he hits like a tank and he has wrestling credentials. If Chieck Kongo can drop Cain and Junior Dos Santos can knock Cain out, I don’t see why Carwin can’t. I think he could beat Overeem too as Reem is very inconsistent. But he’d lose against Cigano again or Stipe Miocic due to being slower and lacking cardio; those guys can also take his punches. Werdum could submit him too.
He may be a force to be reckoned with in Rizin though
When’s the next fight?