Former Oakland A's, Washington Nationals reliever announces retirement
Book Pitcher Sean Doolittle Retires from Day Job
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors, Sports
Nationals' Sean Doolittle retiring after more than a decade in the majors
Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors – NBC4 Washington
Nationals' Sean Doolittle retiring after more than a decade in the majors
Nationals Doolittle Retires Baseball, National
Washington Nationals
After 11 seasons in the MLB, NATS pitcher, Sean Doolittle announces retirement and his next steps