How did baseball phrases become part of everyday American language?

Baseball phrases became deeply embedded in everyday American language because the sport served as a primary cultural "common denominator" for a nation composed of diverse ethnic and religious groups. As baseball established itself as "America’s game," the experience of playing, watching, and discussing the sport provided a shared vocabulary that transcended regional and social boundaries.1

The integration of these terms into the national lexicon was facilitated by several factors:

• Cultural Ubiquity: By the mid-19th century, baseball imagery began appearing in periodicals, and the sport became a frequent subject for popular media, including the work of illustrator Norman Rockwell and various literary and film motifs.1
• Standardized Language: Because the rules and actions of the game—such as the "hit-and-run," "double play," and "sacrifice bunt"—were carried out identically across the country, the terminology became a reliable, universally understood shorthand for describing situations in other areas of life.1
• Metaphorical Utility: Phrases like "he threw me a curve," "covered all the bases," and "out in left field" became common in ordinary conversation, even among those not deeply involved in the sport. This usage became so routine that it occasionally challenged foreign observers attempting to translate American political discourse.1