Originally Posted by kaldaniels
Chapman's slider is nasty. But I would certainly wager hitters would improve the second and third time thru the order if Chapman threw the slider in each at bat.
Why though? They know he throws a slider in at bat #1. They know that he probably isn't throwing it behind in the count and will throw it when ahead in the count or even in the count. If he is tipping the pitch, that is one thing, but if he isn't, then at bat 1 or at bat 15 shouldn't really make a difference assuming the velocity remains the same on the FB and the SL.