The Washington Nationals are acquiring left-handed reliever Sean Doolittle and right-handed reliever Ryan Madson from the Oakland Athletics for right-hander Blake Treinen and two prospects.
The prospects headed to the Athletics are left-hander Jesus Luzardo and third baseman Sheldon Neuse.
The Nationals have been looking for help at the back end of their bullpen. Treinen, 29, is 0-2 with a 5.73 ERA and two saves in 37 2/3 innings. He is one of six pitchers with at least two saves for Washington, but nobody has more than Koda Glover's eight, and he is on the disabled list.