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Koji Uehara retires from baseball
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Koji Uehara - Wikipedia
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Tommy Hunter Statcast, Visuals & Advanced Metrics, MLB.com
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Rangers Jose Leclerc an elite relief pitcher
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All-Time Boston Red Sox Roster: Koji Uehara - Over the Monster
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Red Sox rotation full of questions for 2023
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Who will be this season's surprise closers?
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Jason Grilli Statcast, Visuals & Advanced Metrics, MLB.com
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Red Sox expect closer Koji Uehara to be ready for Monday's home opener
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Boston Red Sox Stat of the Day, July 2021
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RED SOX NOTEBOOK: Koji Uehara may be back soon
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Boston Red Sox Stat of the Day, July 2021
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Boston Red Sox Stat of the Day, July 2021
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How Yennier Cano became biggest breakout reliever of 2023
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Rangers Jose Leclerc an elite relief pitcher