What's up with those catchers' wristbands in MLB?

MLB news: Teams testing audio system to prevent sign stealing - Sports Illustrated

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Push-Button Pitching: MLB to Let Pitchers Call Own Signals

MLB: PitchCom Wristbands catchers wear to signal pitches explained

Marketing and Sponsorship: Big problem, tiny solution: PitchCom helps MLB make stealing pitch signals a sign of the past

Rays' catchers to sport info-loaded wristbands

MLB umpires wear wristbands to protest 'abusive' treatment

High school notebook: New baseball, softball rules coming; locals shine in Futures Game - The San Diego Union-Tribune

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Why did MLB teams wear yellow wristbands and ribbons on September 3? - AS USA

Wristbands For Pitchers? Some Colleges Embrace New Way To Call Games — College Baseball, MLB Draft, Prospects - Baseball America

MLB Went Blue to Commemorate Father's Day With Statement Colors on Uniforms

Wristbands catching on with Section III softball teams

Our new Franklin Sports Playbook Compression Wristband enables you to keep your plays on your wrist for easy viewing and play calling. The sleek

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