Nationals: Sean Doolittle, a World Series champion, retires
Washington Nationals' Sean Doolittle set for elbow surgery; season
Nationals reliever Sean Doolittle on IL with sprained elbow - The
Washington Nationals re-sign Sean Doolittle to minor league deal
Nationals' Sean Doolittle Declines Trump White House Visit
All-Star reliever Sean Doolittle retires after 11 seasons
Sean Doolittle retires after 11 MLB seasons, leaving lasting
Sean Doolittle feels 'like a rookie again' ahead of second stint
Interview with Sean Doolittle of the Washington Nationals
Beloved relief pitcher Sean Doolittle is back with the Washington
2019 NLDS: Sean Doolittle Insists Nationals 'Weirdly Comfortable
Sean Doolittle retires after path led to All-Star, World Series honors
Sean Doolittle's guide to Washington D.C.