The Houston Astros used an elaborate system the steal signs from catchers during 2017 home games.
According to The Athletic the system used a camera connected to a monitor in the tunnel, they identify the pitches and communicate the expected pitches to the hitter.
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Apparently they do not use the system for every single at bat, analyzing videos show that the system is use mostly when they have runners on base as we will show in this documental.
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