Eras of ERA – The Sport Journal
Baseball bat - Wikipedia
The Only Rule Is It Has to Work
2010 baseball rule book available
Are MLB's new rules putting the action back in baseball? The results will surprise you - The Athletic
Essential for armchair umpires and scorekeepers, this guide challenges aficionados on every significant part of the Official Baseball Rules.
So You Think You Know Baseball?: A Fan's Guide to the Official Rules
2022 Official Rules of Major League Baseball: Triumph Books: 9781637270608: : Books
The unwritten rules of baseball
MLB rule changes for 2023 include pitch clock and banning of defensive shifts – NBC Sports Philadelphia
Random Ray of the Day: Jose Guillen - DRaysBay
Oklahoma City Dodgers' Devin Mann hits controversial home run