The Los Angeles Dodgers bolstered their bullpen on Friday, acquiring right-hander Ryan Madson from the Washington Nationals for a minor league pitcher. The five-time defending NL West champions have Kenley Jansen as their closer, but he's been shaky since coming off the disabled list, allowing seven earned runs in four innings over four appearances. Madson was 5-5 with five saves and a 4.08 ERA in 69 games for Washington.