Home Run Derby: Sean Doolittle thought fans were booing Bryce Harper
Ex-Nats reliever Sean Doolittle exits after '11 incredible seasons' - ESPN
Throwing Four-Seamers with the Force: Talking Star Wars with Sean Doolittle of the Oakland A's
Athletics 2014 season review: Sean Doolittle, from washout to All-Star - Athletics Nation
Washington Nationals exercise 2019 club option for closer Sean Doolittle - Federal Baseball
Washington Nationals: The All-Star Case for Sean Doolittle
Nationals pitcher Sean Doolittle critical of people who use gay slurs - Outsports
Former A's reliever Sean Doolittle returns to Coliseum: 'I grew up here, man
Sean Doolittle (toe) on Nationals' disabled list, won't pitch in All-Star game
Sean Doolittle's guide to Washington D.C.
All-Star reliever Sean Doolittle retires after 11 seasons - Field Level Media - Professional sports content solutions
Washington Nationals need Sean Doolittle to be Sean Doolittle again; and he's almost there - Federal Baseball
Sean Doolittle - Wikipedia
Home Run Derby: Sean Doolittle thought fans were booing Bryce Harper