WASHINGTON — Devin Williams is looking like his vintage self because he returned to pitching in a way that makes him most comfortable.After making a key adjustment at the height of his struggles in late April, Williams has excelled as the New York Mets’ closer: 9 2/3 scoreless innings, two hits, two walks, 12 strikeouts.He kept rolling on Thursday when he secured the save in the Mets’ 2-1 win over the Washington Nationals to lower his ERA to 4.32.One month ago, Williams held a ghastly 10.29 ERA. He had allowed runs in four straight games. It was not the way he had wanted to start his first season as the Mets’ closer, replacing Edwin Díaz, after signing a three-year deal worth $51 million.After an outing on April 23, Williams analyzed video with quality control coach Danny Barnes. The session led to Williams raising the starting position of his hands. Since then, he has held his hands more parallel to his chest. Williams had always thrown this way — up until last year.With a nudge from the New York Yankees last season, Williams moved his hands lower to combat tipping. In 62 innings with the Yankees, Williams had a 4.79 ERA. Over the six previous seasons with the Milwaukee Brewers, Williams had a 1.83 ERA.