Manny hasnt had a KO in 4 years and hes fighting a guy who has arguably the best chin in the sport. I cant see any way Manny wins by KO. Manny had Bradley, a pillow fisted puncher in front of him with a broke ankle and couldnt take him out, now hes going to have a volume puncher with power in his face for as long as it lasts. I think Rios wins easy. Manny's whole career is defined by fighting legends at catch weights and JMM, who prior to Pac was having tough fights with Katsidis and Juan Diaz. Even right before the last Pac fight he was unimpressive against Fedchenko. Manny catches a beating tomorrow as hes in with a strong real opponent.