Major League Baseball approved use of electronic device for catchers to signal pitches in effort to eliminate sign stealing - ABC13 Houston
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College World Series: College Baseball Showing Signs of a Revolution With Catcher Wristbands - WSJ
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Wouldn't allowing MLB catchers to wear some type of earpiece to solve possible cheating and sign stealing? - Quora
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Sign of times: MLB approves use of anti-sign-stealing technology for calling pitches
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