Minor League Baseball is a professional baseball league hierarchy.
Minor league salaries vary based on class level and length of season; however, the majority of players make less than $10,000 per season
Minor league umpires have been unionized since 1999 to 2023, when they formed the Association of Minor League Umpires (AMLU), which has been a guild within the Office and Professional Employees International Union (OPEIU) since 2010 to 2023

