During World War II, the U.S. military designed hand grenades to the shape and size of a baseball because "any young American man should be able to properly throw it"

To help enhance grip, every baseball used in a major league game is rubbed with a particular kind of mud only found at a secret location in New Jersey

Jim Abbot, a left-handed pitcher who was born without a right hand, threw a no-hitter against the Cleveland Indians in 1993

Major league pitchers are allowed to switch their throwing arm in the middle of an at-bat, but only if they have injured the other one

Instead of crouching, catchers stood a few feet behind home until the early 1900s

Ground rule doubles were counted as home runs until 1930