McCullum wins a competitive decision for me. GGG is excellent but he would be reluctant to pull the trigger vs McCullum and i think McCullum would do a lot of damage with his body shots. GGG's amazing jab would keep him in the fight and he would land the ocassional big right or left but just not with enough frequency to win. I feel GGG was overly respectful at times vs quality opponents. Sometimes you need to go for it.
It's a great technical fight but I think Mike is just too economical and sharp for GGG if Canelo was too sharp for GGG think what Mike would be