Reynaldo Lopez had a rough go of it Saturday against the Giants, allowing four hits, three runs and five walks in a no-decision.
Trea Turner collected two hits Saturday in a losing effort against the Giants.
Nationals acquired RHP Mark Melancon from the Pirates for LHP Felipe Rivero and LHP Taylor Hearn.
Ken Rosenthal of FOX Sports reports that the Nationals have agreed to acquire Mark Melancon from the Pirates.
Ken Rosenthal of FOX Sports reports that the Nationals are focused on acquiring closer Mark Melancon from the Pirates.
Daniel Murphy (hamstring) is not in the Nationals starting lineup on Saturday.
Nationals recalled RHP Reynaldo Lopez from Triple-A Syracuse.
Daniel Murphy was pulled from Friday's game against the Giants when his leg tightened up on him in the sixth inning.
Max Scherzer held the Giants to one run in seven innings as the Nationals won 4-1 on Friday.
Shawn Kelly chalked up his sixth save by retiring one batter in the ninth inning on Friday.
Jayson Werth went 2-for-3 with an RBI and a run scored on Friday night.
Nationals manager Dusty Baker confirmed Friday that Reynaldo Lopez will start on Saturday against the Giants.
Trea Turner is not in the Nationals starting lineup against the Giants on Friday.
Nationals recalled C Pedro Severino from Triple-A Syracuse.
Nationals placed C Jose Lobaton on the 15-day disabled list, retroactive to July 20, with left elbow tendinitis.