Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors
10 Reasons We're Going To Miss Sean Doolittle
Vesting option could allow Washington Nationals' closer Sean Doolittle to become a free agent after this season - Federal Baseball
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors
Cubs threaten protest vs. Nats over Doolittle's delivery
Sean Doolittle - Wikipedia
Sean Doolittle saves a World Series game - Athletics Nation
Washington Nationals need Sean Doolittle to be Sean Doolittle again; and he's almost there - Federal Baseball
I just can't do it.' Nationals closer Sean Doolittle declines White House visit