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Sean Doolittle feels 'like a rookie again' ahead of second stint
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Sean Doolittle retires after 11 MLB seasons with a 'full heart
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Nats Sean Doolittle not going to White House
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Sean Doolittle is back with the Washington Nationals after signing
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Sean Doolittle Returning To Washington Nationals
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Washington Nationals agree to terms with Sean Doolittle
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Felix Hernandez opts out of MLB season, Sean Doolittle on fence
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Washington Nationals' World Series pitcher Sean Doolittle declines
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Doolittle: Mariners embrace 'underdog mentality' and have defied
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Sean Doolittle, Aníbal Sánchez deal with Nationals
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