Re: Baseball by the book:Plate Discipline
I don't see the connection between the two issues raised (Pitcher Abuse and Pitches per AB).
As for the first point. Does a higher P/PA lead to a higher RS/G?
I'd start by correlating those two variables DIRECTLY. Plot P/PA vs. RS and run a regression on it.
See if there is a correlation (positive, negative, etc.) and how good it is.
It would probably help to have a larger sample size.
If you do get a correlation that may be significant, it would help to get corroboration from another data set (i.e. another team).
This is an interesting example of how individual stats may (or may not) not project into team stats.
It is apparent that -on a team basis- that RS correlates pretty well with OBP.
On an individual (player) basis, OBP correlates pretty well with P/PA.
It would seem logical that RS (team) should correlate with P/PA (team).
Your preliminary data shows the opposite.