Nationals' Andres Machado: Called up from Triple-A

The Nationals selected Machado's contract from Triple-A Rochester on Sunday.

Machado gives the Nationals a fresh arm in the bullpen and has pitched solidly in the International League with a 2.92 ERA and 1.22 WHIP over 12.1 innings in 10 appearances. He'll likely serve as a middle-relief arm initially.