(Props: @roynelsonmma) Look, I understand that a good deal of Roy Nelson’s size is contained in his belly, which has been compared to the moon both for its shape and density. And I know that black is a slimming color in general. But check out this recent picture of Roy standing next to light-heavyweight Forrest Griffin and tell me that Big Country isn’t fighting way, way out of his natural weight class. I know, that’s not exactly a ground-breaking observation, but good Lord, those chicken legs.…