Nationals acquire Ryan Madson, Sean Doolittle from A's
Dodgers trade Adam Kolarek and Dylan Floro for prospects - Los Angeles Times
A's trade popular pitcher in five-player deal with Nationals – East Bay Times
A's trade popular pitcher in five-player deal with Nationals – East Bay Times
2017 Oakland Athletics Midseason Top 10 Prospects — College Baseball, MLB Draft, Prospects - Baseball America
Washington Nationals: Ryan Madson traded to the Dodgers
A's trade Sean Doolittle to Nationals in 5-player deal
Mets: Why a trade for reliever Blake Treinen is worth exploring
Trading a top prospect for Sean Doolittle was risky, but Nationals hope a title is the reward - The Washington Post