KISS Method.
Freshman - who cares (parents)
JV - same as Freshman
Varsity (check out above)
Note, the coach knows who he wants on his varsity team and should get necessary feedback from the assistant coaches.
Coaches might also be recording stats on a website like maxpreps.
Note, IMHO I don't think colleges look at HS stats in detail. They would want to see you perform at a showcase or camp and determine if your son can play said level of baseball.
As stated by @2022NYC just record in your sons AB and if he pitches his outings.
Benefits:
- It keeps you quiet and not fall into the parent comment trap
- provide the feedback to your son without directly providing him feedback. A video is worth a thousand words.
- supply insights to his hitting or pitching coach for small tweaks
- you have a lifetime of memories
Note, in the 4 years of HS varsity baseball, I very rarely initiated comment on my sons HS games.
All that I told the coach was by junior year, the team would vy for the state championship.
Keep everything in perspective and enjoy your son's journey.