Nationals re-sign Sean Doolittle to minor league contract
Reports: Reds To Add Veteran Closer Sean Doolittle - Red Reporter
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors - NBC Sports
Doolittle announces retirement after 11 MLB seasons - Blog
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors - WTOP News
Sean Doolittle, known for his liberal views, won't be at the White House on Monday - The Boston Globe
Former Oakland A's, Washington Nationals reliever announces retirement
Washington Nationals relief pitcher Sean Doolittle : Bullseye with Jesse Thorn : NPR
Sean Doolittle retires after 11 MLB seasons with a 'full heart
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors
Nationals Star Sean Doolittle Writes Goodbye Message to DC - Washingtonian