The Nationals are expected to decline Rafael Soriano's $14 million option for 2015.
With Drew Storen unavailable, Rafael Soriano gave up a run but converted the save in a win over the Marlins.
Asked to protect a 4-0 lead in the ninth, Rafael Soriano was charged with two runs while getting two outs against the Braves.
Nationals manager Matt Williams said that Rafael Soriano's bullpen session went well Monday.
Rafael Soriano will take the rest of the weekend off to work on his mechanics and his slider, before throwing a bullpen session on Monday.
Nationals manager Matt Williams hinted after Friday's blown save that Rafael Soriano may be removed from his role as the team's closer.
Rafael Soriano survived a shaky ninth inning Friday against the Pirates for his 29th save of the season.
Rafael Soriano earned his 28th save of the season with a perfect ninth inning in Thursday's win over the Mets.
Rafael Soriano escaped a tense ninth inning, in which he allowed a run, to pick up his 27th save as the Nationals narrowly defeated the Mets on Wednesday.
Rafael Soriano took his fourth blown save and his first loss of the year after giving up four runs in the ninth Monday against the Marlins.
Rafael Soriano delivered a scoreless ninth inning Friday against the Reds for his 24th save of the season.
Rafael Soriano pitched a scoreless ninth inning against the Rockies on Tuesday to earn his 23rd save of the season.
Rafael Soriano blew the save in the top of the ninth, but escaped with the win as the Nationals walked off against the Brewers on Sunday.
Rafael Soriano tossed a perfect ninth inning to earn his 21st save of the season against the Cubs on Sunday.