Where in the world is this coming from? And can it possibly sustain?
(*wOBA is Weighted On-Base Average, which is very similar to On-Base Percentage except it gives increasingly more credit to extra base hits as opposed to treating every time on base equally, as OBP does. The 2017 Major League average wOBA is .318.)
The easy answer is to go with the narrative that seems to be cropping up, that Atlanta's new SunTrust Park is the biggest launching pad this side of Coors Field.