Nationals' Sean Doolittle retiring after more than a decade in the
Nationals' Sean Doolittle fires back at Daniel Hudson's critics
Nationals: Sean Doolittle, a World Series champion, retires
Nationals pitcher Sean Doolittle announces retirement
Longtime Washington Nationals, Oakland Athletics Reliever Sean
Sean Doolittle retires after 11 MLB seasons with a 'full heart
Book Pitcher Sean Doolittle Retires from Day Job
Washinton Nationals' Sean Doolittle back with something to prove
Nationals reliever Doolittle doesn't plan on attending White House
Washington Nationals re-sign Sean Doolittle to minor league deal
Washington Nationals' World Series pitcher Sean Doolittle declines