It has nothing to do with skin color, I ALL HAS TO DO WITH GENETICS.On the Average African American bodybuilders have smaller waists, get striated glutes, get Harder, and have rounder muscle bellies then the average white or Spanish bodybuilder.
I have seen white guys with small waists, and striated glutes, but it not nearly as ofter as it is with African American bodybuilders.What color where the 2 bodybuilders who won there pro cards at the Mr USA ?
My point is I dont think Trey Brewer has small joints, and round muscle bellies, like most of the African American Bodybuilders do that he is competing against.I dont think Trey Brewer has the symmetry, or the same lines as Edward Nunn does who won the Super heavies at the USA.