Oakland A's trade Sean Doolittle & Ryan Madson to Nationals for

3 Oakland Athletics prospects you need to know - Minor League Ball

At long last, trade with Athletics brings Nationals a bit of relief - The Washington Post

Nationals acquire Sean Doolittle and Ryan Madson from Athletics in exchange for Blake Treinen, two others - The Washington Post

Oakland A's 2018: Scouting, Projected Lineup, Expert Insight

Oakland A's trade Sean Doolittle & Ryan Madson to Nationals for Blake Treinen & 2 prospects - Athletics Nation

Trading a top prospect for Sean Doolittle was risky, but Nationals hope a title is the reward - The Washington Post

Know Your Enemy: Oakland A's - South Side Sox

Nationals closer Sean Doolittle hopes slider makes him more complete

Nationals overhaul bullpen with trade for Sean Doolittle, Ryan Madson