Stephen Strasburg gave a sneaky grin and a confident "yeah" when asked whether he was being more aggressive on the mound. He knew what the question was in reference to, and he appeared to have been waiting five days to answer it. After the righty's previous start, manager Davey Johnsons said, "He really doesn't know who he is at times." Strasburg knew who he was Wednesday all right: Dominant. The 24-year-old ace struck out 11 in seven innings, Michael Morse and Danny Espinosa hit consecutive homers and the Washington Nationals completed a sweep of the free-falling New York Mets with a 5-2 victory.