The last time I maliciously threw a punch at someone I was as a 13 y/o in 1994, and I knocked that dude the fuck out in one punch. I am sure that I have not lost my one-hitter-quitter power potential.

Therefore I postulate if I was able to sucker punch Rousey before she realizes we were even fighting, landing that shot in the perfect spot on her temple I stand like a 0.1375% chance of beating her. That or if I had some sort of malice weapon that I could keep her at a distance because if she gets within striking radius, it's curtains.