In the third inning of the Brewers' 7-1 win over the Rockies on Saturday, Milwaukee pitcher Jacob Misiorowski threw a four-seam fastball low and outside to Kyle Karros for a ball. The pitch was special and routine all at once. Its measured velocity of 103.7 mph makes it the fastest pitch by a starter in official recorded history. But the speed of that fastball has somehow become business as usual…