Former Oakland A's, Washington Nationals reliever announces retirement

Oakland Athletics News - MLB

Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors – NBC4 Washington

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Sean Doolittle - MLB News, Rumors, & Updates

Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors - WTOP News

Sports digest: Oakland A's acquire reliever from Washington Nationals – The Mercury News

Sean Doolittle retires after path led to All-Star, World Series honors

Reliever Sean Doolittle announces MLB retirement after 11 seasons – NBC Sports Bay Area & California

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