World Series champion pitcher retires from MLB after 11 seasons (video)
Sean Doolittle retires after path led to All-Star, World Series honors
Sean Doolittle retires after path led to All-Star, World Series honors
Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
All-Star reliever Sean Doolittle retires after 11 seasons - Field Level Media - Professional sports content solutions
A's pitcher Trevor May rips Oakland owner John Fisher in retirement video: 'Sell the team, dude', DC News Now
Sean Doolittle retires after path led to All-Star, World Series honors
Oakland Athletics Team News, Fixtures and Results
Jon Lester - Wikipedia
Sean Doolittle retires after 11 MLB seasons, leaving lasting Nationals, A's legacy - The Athletic
Oakland Athletics News - MLB
Sean Doolittle retirement: World Series champion, All-Star relief pitcher Sean Doolittle announces retirement after 11 seasons