The Washington Nationals found themselves in a familiar position Sunday afternoon. After dropping their first two games against the Pittsburgh Pirates, the Nats again were trailing in the third and final game of the series. Down 3-1 in the seventh, and in danger of being swept for the fourth time in a month’s time, the Nationals turned to pinch-hitter Alex Escobar. With Jose Guillen on board with a walk, Escobar drilled a shot over…