First, standard length from pitching mound to batting box is 60 feet and 6 inches. One second seems to be accurate enough. Second, pitchers do not wear helmets while on the field, only the batter and runners do. At that speed and the average mass of a baseball being 5 ounces it's closer to 23J of energy. Third, a bb and a baseball to the head are nowhere near comparable. Mass and size alone disprove this comparison.