OAKLAND — The Oakland A’s gutted their bullpen on Sunday morning, trading left-hander Sean Doolittle and right-hander Ryan Madson to the Washington Nationals.

The move, which the club announced approximately three hours before first pitch against the Cleveland Indians, brought back right-hander Blake Treinen and minor leaguers Sheldon Neuse (infielders) and Jesus Luzardo (left-handed pitcher).

While Treinen will fill one of the open spots in the bullpen, the team selected right-hander Simon Castro from the Triple-A Nashville Sounds to occupy the second.

Treinan was originally a 2007 draft pick of the A’s before the team sent him to the Nationals in a three-team swap in January of 2013. The reliever owned a 5.73 ERA in 37 appearances for Washington and sported a .320 opponents batting average.

Neuse, who was playing in High-A, was ranked the No. 6 prospect in Washington’s system by MLB.com. Luzardo, who was pitching for the club’s Gulf Coast Rookie League affiliate, was No 10.blake treinenjesus luzardoMLBOakland A'sryan madsonSean Doolittlesheldon neuseWashington Nationals