How? By falling on him? Jr has no defense, and Golovkin never misses a single opening. The weight difference won't matter, as it will be target practice for Golovkin. I'd be shocked if Jr made it to the second round.
Golovkin may be the most accurate puncher out there. His jab is amazing, he throws shots from all angles and never seems to be off balance doing so. I'll go with GGG by mid rounds stoppage. Would be an exciting match up but I'd like to see GGG facing Geale in order to unify the division by the end of next year.