It felt like 20 yards, he said Thursday. Probably, it was more like 6. But this defensive tackle was a big boy — maybe 6 feet 5, 380 pounds. Only Brown, the son of “Zeus” himself, then tipping the scales at over 400 pounds, loomed larger on the St. John’s College High School (D.C.) football field that day. It’s fair to wonder whether the Grassroots Youth Football League had ever seen such a titanic clash of middle-schoolers. Or a more body-flattening, spirit-crushing climax.