Emancipation of the Minors, by Lily Rothman of Slate.com.
The lead paragraph:
In one of America’s most fabled industries, there’s a hidden underclass of workers that has a starting salary of $1,100 a month and gets paid for only half the year. They are subject to territorial monopolies, restrictions on labor movement, and caps on salaries that are illegal in other businesses. Though not members of a union, their lives are influenced by one of the most powerful labor associations in the country, a group whose members—people who work in the same industry for the same organizations and were once in the same position—have a vested interest in keeping them down. They are minor-league baseball players.
You need to read this piece.