Napoles during his prime was the real deal. He would live up to his nickname and land precise, deadly punches to deck Chavez (I know he had a good chin) twice in the 4th round for a merciful tko. Chavez would be a bloody mess. Not only would he not be able to hit Napoles (ala Whitiker) but he would be on the recieving end of horrendous punishment as well, like he wasn't against the Pea. Napoles could deck him as well as slice him up.
A Napoles - JCC fight at Lightweight may have been even better. JCC started out at the lower weights, and even though I never saw Napoles fight at 135, I was told he was even more devastating down there, but couldn't get fights so he moved up to fight Curtis Cokes at WelterWeight
I never knew Napoles was a lightweight. He had to be a monster there if he was not too weight drained.
Napoles wins this, but I'm pretty sure he wouldn't be stopped. In his prime I don't recall Chavez ever being hurt.