Determining the least liked Major League Baseball team is often a subjective exercise driven by rivalries, historical dominance, and fan sentiment across the country. Historically, marquee big-market franchises such as the New York Yankees and the Los Angeles Dodgers frequently polarize fans, drawing immense admiration from their supporters while inspiring strong animosity from rival fan bases. Additionally, teams involved in major historical sign-stealing controversies or high-profile financial payroll rollouts, such as the Houston Astros, often rank near the top of fan polls measuring national unpopularity and opposing team rivalry.