Baseball

What's Inside a Baseball?

Before baseballs became regulated, they varied from game to game. "Lively" balls had a solid rubber core and were bouncier. "Dead" balls were heavier and didn't fly as far. Home teams chose which ball to use during the game, and would select a ball that played to their strengths—a lively one if they had strong batters, a dead one if they were better in the outfield. Today, a single baseball may take a week to make, but in a Major League game, its lifespan is typically just a few pitches.

Key Facts In This Video

  1. The core of a baseball is called "the pill," and consists of a sphere of cork inside rubber casing. 00:09

  2. Layers of yarn inside a baseball allow it to retain its shape after being hit. 01:06

  3. It takes one week to make a professional baseball. 02:44

Written by Curiosity Staff May 22, 2015

Curiosity uses cookies to improve site performance, for analytics and for advertising. By continuing to use our site, you accept our use of cookies, our Privacy Policy and Terms of Use.