The Major League Umpires Association files unfair labor practice charges with the National Labor Relations Board to block the American League and National League from using minor league replacements in the wake of the union’s mass resignation strategy.

This Day In Baseball

On August 3, 1999 — The Major League Umpires Association files unfair labor practice charges with the National Labor Relations Board to block the American League and National League from using minor league replacements in the wake of the union’s mass resignation strategy.

Source:
Baseball Reference August 3
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