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Twins manager ejected after umpires leave Yankees pitcher in game following sticky substance check
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Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times
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MLB's sticky stuff crackdown 'opening up a can of worms
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Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times
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MLB Asks Umps For More Random Checks On Sticky Substances
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MLB Tightening Up Policy on Sticky Substances to Stop Pitchers Cheating - InsideHook
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Clayton Kershaw weighs in on MLB umpire's sticky substance searches