Zack Greinke did his job, even a tad more. Then the rest of the Dodgers did just enough of theirs to emerge with a 3-1 victory over the Washington Nationals on Wednesday night before a Dodger Stadium crowd of 36,721. Greinke, making his first start since suffering a broken collarbone April 11, turned in a solid 5 1/3 innings. Coming back three weeks early, he had to have made the Dodgers very encouraged. He gave up a solo home run to Adam LaRoche in the fourth inning, but otherwise was able to keep the Nationals at bay.