Kyle Higashioka homered twice, including his first career grand slam, and Dylan Cease pitched seven brilliant innings for the San Diego Padres, who beat the Washington Nationals 8-5 to sweep a contentious three-game series. Higashioka hit a two-run homer off rookie DJ Herz in the second inning and then a grand slam off Tanner Rainey in the eighth that hit high off the brick warehouse in the left-field corner. It was the fourth grand slam of the season for the Padres and second in two nights. Higashioka has eight homers this year.