WASHINGTON — It is Blake Butera’s job to pull the levers, not sign the players, a detail the first-year manager acknowledged after the Washington Nationals blew their 35th save of the season on Sunday afternoon to land two shy of the MLB record.It is his job, Butera said, “to do the best job I possibly can with the team that we have and the bullpen that we currently have.”When asked whether he thinks about the team potentially adding back-end help this winter, though, Butera said, “No doubt.”“We need somebody to step up that wants the ball in the ninth inning to finish the game,” he added.To do so, the Nationals would need to spend money this winter. Maybe that was a conclusion one should have drawn when the Nationals blew an eight-run lead to the San Francisco Giants in early June, or when they blew three games in a row to the Philadelphia Phillies in June, or when they blew three in a row to the New York Yankees in July. But with the end of the season looming, maybe the time to bring it up is right now, after Sunday’s 6-2 loss to the Miami Marlins.On Sunday, after using their best reliever for two innings to protect a 2-0 lead, they turned to Max Kranick and Tom Cosgrove in the ninth inning. They gave up the lead after conceding a bunt single, two walks, a pitching change, a hit batter, a sacrifice fly and then a throw to third that Jorbit Vivas missed and let bounce into the Marlins dugout because Cosgrove did not back it up.The Marlins then stole home and hit a two-run homer. The Nationals listened as the crowd of 20,000 booed the product that the team put out.“It was just a straight-up embarrassing inning,” Cosgrove said. “I didn’t do a single thing right.”