AMLU is the exclusive recognized bargaining agent for all professional minor league baseball umpires across the United States and Canada.

Founded in 1999, AMLU has fought to improve the lives, wages, and working conditions for minor league umpires and has fought to uphold the integrity of the game of baseball.

Membership has its privileges.

AMLU members have access to hundreds of money saving discounts and programs.

AMLU is an affiliate union of Office and Professional Employees International Union and the AFL-CIO.

AMLU leadership works with Minor League Baseball and Major League Baseball to represent our members.

PROMOTING the integrity of the hardest working employees of the national pastime.

Association of Minor League Umpires

Office and Professional Employees International Union