My off-season project in 2023-2024 was to document changes in the baseball playing and scoring rules. Summaries in one of the Macmillan encyclopedias and by Tom Heitz in Total Baseball have been valuable, although theres no substitute for going through annual rule books to determine exactly what was added, deleted, or changed.
I started with 1950 because thats when the massive reorgainzation occurred. After getting my arms around the changes from the previous years, I moved forward year-by-year (and will now move backward year-by-year). In addition to the list of rules by year, I categorized the changes into one document.
Please peruse and enjoy, and let me know of errors or whatever else you think needs attention at stew@stewthornley.net.
As an added bonus, beyond the rules changes is a quiz on determining earned and unearned runs in case you are an official scorer or just someone who enjoys second-guessing official scorers.