The Dodgers acquired right-handed reliever Ryan Madson from the Nationals, the team announced Friday. In exchange for Madson, the Nationals received minor league pitcher Andrew Istler.
To create room for Madson on their 40-man roster, the Dodgers designated lefty Adam Liberatore for assignment.
Madson, 38, was placed on revocable waivers earlier this week and the Dodgers put a claim in hoping the reliever could help out their strained bullpen, according to MLB.com's Ken Gurnick.
Los Angeles could use Madson in a setup role or possibly as a closer if Kenley Jansen has trouble again with an irregular heartbeat.