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Chris Marinak sits in front of a bank of television screens during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday, March 26, 2014. Less than a week before most teams open, MLB is working on the unveiling of its new instant replay system, which it hopes will vastly reduce incorrect calls by umpires.Richard Drew/The Associated Press

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Banks of television screens line the walls of Major League Baseball's Replay Operations Center during a preview of the venue, in New York, Wednesday.Richard Drew/The Associated Press

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A technician works in front of a bank of television screens during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday.Richard Drew/The Associated Press

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A technician works in front of a bank of television screens during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday.Richard Drew/The Associated Press

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Two technicians work in a booth during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday, March 26, 2014.Richard Drew/The Associated Press

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Two technicians work in a booth during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday.Richard Drew/The Associated Press

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Chris Marinak sits in front of a bank of television screens during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday.Richard Drew/The Associated Press

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A technician works in front of a bank of television screens during a preview of Major League Baseball's Replay Operations Center, in New York, Wednesday, March 26, 2014.Richard Drew/The Associated Press

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