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Sean Doolittle, Baseball's Left-Wing Lefty, Retires
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Jose Castillo on comeback trail again for Padres - The San Diego
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How Nationals closer Sean Doolittle became a dominant one-pitch
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Sean Doolittle returns to Nationals Park as a Cincinnati Red - The
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MLB Power Rankings: Where All 30 Teams Stand Entering Free Agency
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Ex-Nats reliever Sean Doolittle exits after '11 incredible seasons
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Sean Doolittle, part of Nats' World Series team, retires - The
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Sean Doolittle, Baseball's Left-Wing Lefty, Retires
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Sean Doolittle, Eireann Dolan on D.C
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Sean Doolittle Announces Retirement - MLB Trade Rumors
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Nationals Acquire Sean Doolittle, Ryan Madson - MLB Trade Rumors