How did gambling affect the early professionalization of baseball?

Gambling played a significant and often corrupting role in the early professionalization of baseball in the United States. As the sport grew in popularity following the Civil War, the transition from amateur social clubs to commercialized, competitive teams attracted the interest of gamblers.12

The influence of gambling affected the game in several ways:

• Pressure to Win: As clubs began charging admission and seeking prestige through interclub rivalries, they faced intense pressure to field high-quality teams. This led to the hiring of skilled players on a per-game basis, marking the beginning of professionalization.12
• Corruption and Bribery: Unregulated gambling frequently brought criminal elements into the sport. Players were often bribed to lose matches purposely, a practice that caused significant friction between professional teams and amateur purists who resented the associated dishonesty.123
• Institutional Response: The prevalence of gambling and bribery forced early leagues to take action to protect the game's legitimacy. For example, when William Hulbert, president of the National League, expelled four players for dishonesty, it significantly enhanced the reputation of baseball as a professional institution.12

These early tensions culminated in later, more infamous events like the Black Sox Scandal, which underscored the ongoing struggle to maintain the integrity of the sport against the influence of betting.43