WASHINGTON — Jazz Chisholm Jr. sensed the vibes were off within the New York Yankees’ clubhouse. All the losing. All the bad luck and the bad at-bats.It had taken its toll, and when Chisholm stood before his position player teammates during a pregame hitters meeting at Tampa Bay two days ago, he implored them to stop shouldering the burden of turning around the team’s fortunes alone and to rediscover their bonds.“I felt like we weren’t being together off the field as much as we normally do,” he said Friday, “and I felt like we just had to tighten up and be for each other instead of being for ourselves.”The Yankees embodied that ethos when they wildly celebrated together after Chisholm’s two-run, go-ahead home run in the ninth inning of a 5-3 win over the Washington Nationals at Nationals Park on Friday night.There were personal handshakes. There were high-fives. And there was Chisholm, flipping his bat and spreading his arms wide before rounding the bases — his moonshot blast off lefty Matt Krook staying just within the right-field foul pole and plating Jasson Domínguez, who had singled in the previous at-bat.Manager Aaron Boone laughed when asked about Chisholm’s home run celebration.“I’m not sure if he knew it was gone or not,” Boone said.Actually, Chisholm wasn’t sure.“I thought I missed it,” he said. “I’m not going to lie. I thought I hit it too high again.”