Figure that a major league quality fastball runs from 92 to 95 mpg. An extraordinary fastball clocks in at 97 or 98. A remarkable arm hits 100. Chapman blazed 5 mph faster than that. At 60'6" distance from the plate to the pitching rubber, I have no idea how you would begin to pick that up, much less hit it. And if the kid has ANY movement on it AT ALL, batters are trudging up, listening to the wind shriek past, and returning to the dugout.