Last updated October 17, 2026
Some links are affiliate links; we may earn a commission at no cost to you. Sponsored spots are labeled "Sponsored". Commissions never change the data: specs and rules always come from official sources. Full details, including which programs we use, are on the affiliate disclosure page.
These are static sites. We don't use accounts, ad networks, third-party scripts or tracking cookies. Sponsored spots are plain links built into the page. If you click an affiliate link, the retailer or its affiliate network may set its own cookies on its site to credit the sale. The newsletter forms are placeholders and don't collect or send any data yet. When a newsletter goes live, this page will name the provider and explain what is stored and how to unsubscribe. Our hosting provider may keep standard server logs (such as IP address and pages requested) for security and reliability.
Rules and products change. Each page links its source and retrieval date. Always confirm with your league, association or tournament director. Nothing here is legal or medical advice.
A contact address will be added at launch.
One email for GloveCode, ArmRules, BatCode and BatRules: new glove and bat data, plus pitch-count and bat-rule changes. (Placeholder: signup is not connected yet.)