He looks enormous , taking batting practice. At 6'4", there's a belly on him but plenty of muscle to go with it, a thickness that shows through his green T-shirt, gray shorts and desert-camouflage leggings. He's bigger than everyone else on the field. When he hits, it sounds like firecrackers going off. The field here in Puebla, Mexico, is standard size for a professional ballpark—325 feet down the lines, 387 in the gaps, 408 in center—but when this man hits, it looks smaller than that.This is what . . .