Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors
I just can't do it': Nationals pitcher Sean Doolittle declines White House invite, Washington Nationals
Nationals' Sean Doolittle explains declining White House invite - The Washington Post
Sean Doolittle retires after 11 MLB seasons, leaving lasting Nationals, A's legacy - The Athletic
A's trade Sean Doolittle to Nationals in 5-player deal
Ex-Nats reliever Sean Doolittle exits after '11 incredible seasons' - ESPN
The Nationals' season has reached a nadir - Beyond the Box Score
Sean Doolittle retires, his gratitude far outweighing any regret - The Washington Post
Sean Doolittle, part of Nats' World Series team, retires - The Washington Post
Sean Doolittle wants a different ending with Washington Nationals - The Washington Post