He maybe not the best boxer and have the most refined skills, but with his huge output, massive engine, granite chin, good power and unstoppable will, strength and size he would easily UD mayweather. He would also knockout pacquiao from that I'm certain.
So far in his two step ups he's.... Beaten Johan Perez better than Herrera by not losing a round and nearly beating him to death. And he beat Ronald Cruz far better than Spence by stopping him when Errol couldn't.
Better than Spence and Herrera is the key to that statement. Have you actually watched Mikhaylenko fight, he's awkward as hell throws punches at odd angles, and impressive defense, never stops coming forward good at cutting off the ring and crowds opponents very well, many things that give Floyd issues. Wins over Berto, Soto-Karass and Aydin are about impressive as a KO win over Perez and Cruz who like I said even the next big thing who's on a KO streak Spence couldn't take out. Would he beat Floyd probably not but he has a tiny slight chance stylistically speaking.
And when Mayweather beats him he cherrypicked a slow tailor made plodder, oh and of course if he boxes him he "ran". queue the duck runhugger (my current fav), cherrypicker comments.
:deal I agree on the Resumé part, on him winning by UD, well wow thats like saying you'd beat Usain Bolt in the 100m. lets agree to disagree butt i have watched couple video's of him since reading and he is no slouch i'll give you that.