MLB umpires wear wristbands to protest 'abusive' treatment
MLB Umpires Drop Wristband Protest, Agree to Meet with Rob Manfred
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Umpires end protest after MLB commissioner agrees to meeting
MLB notes: Umpires end their protest, will meet with commissioner
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MLB umpires protesting 'escalating verbal attacks
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MLB Umpires Protest Verbal Abuse - Gaslamp Ball
League Rules
MLB umpires wear wristbands to protest 'abusive' treatment
MLB umpires wear wristbands to protest 'abusive player behavior
Chicago Tribune
