Home Run Derby: Sean Doolittle thought fans were booing Bryce Harper
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors, Sports
How Nationals closer Sean Doolittle became a dominant one-pitch reliever - The Washington Post
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors - NBC Sports
Nationals pitcher and LGBTQ ally Sean Doolittle retires from MLB - Outsports
Washington Nationals: Should Sean Doolittle Be An All-Star?
Is A's reliever Sean Doolittle the most interesting man in baseball? - ESPN
Oakland's Sean Doolittle leads list of MLB's underappreciated All-Stars - Sports Illustrated
Washington Nationals pitcher Sean Doolittle to join Cincinnati Reds - The Washington Post
Sean Doolittle placed on injured list