Sean Doolittle, Baseball's Left-Wing Lefty, Retires

Sean Doolittle Announces Retirement - MLB Trade Rumors

A's Q&A: Sean Doolittle among baseball's best at doing for others

Whether on the mound or for refugees in need, relief is a calling for the A's' Sean Doolittle - Los Angeles Times

Sarris: Quick analysis of every signing and trade in the first week of baseball's post-lockout madness - The Athletic

Washington Nationals need Sean Doolittle to be Sean Doolittle again; and he's almost there - Federal Baseball

Nationals pitcher Sean Doolittle announces his retirement after more than a decade in the majors - WTOP News

Victory! Minor League Baseball Players Are Finally Unionized.

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