In any given year, roughly 70 million people will attend major-league baseball games. A lucky handful will be treated to something unforgettable: a no-hitter, a walk-off grand slam, a player stealing home. Many more fans will see towering home runs, late-inning rallies and diving catches. But there is one thing every single fan who buys a ticket is 100% guaranteed to see: a bunch of grown men standing in a field, doing absolutely nothing.

Baseball is remembered for its moments of action, and it is no secret that such moments...