Napoles grabs Williams by the ankle and slams him on the canvas over his head like a sling. The ref warns Napoles but then Williams quits in fear.
In all seriousness, though. Nobody likes a 6ft+ southpaw, but only when they're not giving you any options. Paul walked in with very little defence for a world class fighter, and was pretty much always punching, so always open. One of the true grandmasters of counter-punching and staying safe inside somebody's reach, would light him the fuck up. I'm also absolutely convinced Napoles' movement would dumbfound Paul. I never really think of cuts in MMs, but that is genuinely Paul's only chance here. I suppose his high workrate makes it more likely than say, Cotto pulling it off.
Williams constant punching leaves him open for Napoles' counters all night long. I don't think Napoles stops Williams but he will definitely school him pretty bad.