The discussion prompted me to add something to an existing report. I added “1st Pitch BA” out of curiosity. I counted it as an AB if the PA ended on the 1st pitch and the result was a hit, an out, or an ROE. The 1st page is from 2012 to 2014 for 1 team. Page 2 is for the team I scored for in 2016 and 2016. Page 3 is for summer and fall ball for the team I current score for. See attachment.
Yes, BA is a lousy metric, but using it sure makes it seem like being aggressive on the 1st pitch is a pretty good approach for most players.