Baseball Lab

About

Why this
exists

Pitch count rules are not complicated, but they are fiddly, and they are usually tracked on a folded sheet of paper by someone who also has to coach the game. When a kid plays for two teams, nobody is adding it up at all.

Where this stands

  • Rules are data, and every one shows its source.

    No limit is typed into the code. Every number on this site is read from a file that records where it came from and when it was checked, and any value we have not confirmed against a primary source is marked as unconfirmed and never feeds a calculation.

  • Children are not identified in the database.

    Not as a policy — as a schema. The privacy page lists the columns that do not exist.

  • It is a planning aid, not an authority.

    The manager is responsible for knowing when a pitcher must be removed. Your league may be stricter than the published regulation, and if it is, you can tell the app so.

What this will not be

Not a live scorekeeping app. Not a league management system. No rankings, no leaderboards between kids, no social feed, no video. Those are all real products and other people build them well. This one does the arm-safety maths and teaches the game.

Baseball Lab is built and run by one person. If something is wrong — especially a rule — that is worth knowing about.