Roger Bernadina doubled with two outs in the ninth, driving in Bryce Harper for the go-ahead run and the Washington Nationals held on for a 4-3 win over the Boston Red Sox on Sunday, completing a three-game sweep.
Danny Espinosa doubled twice and drove in two runs for the Nationals, who as a franchise had never won at Fenway Park entering the series.
Harper, Washington's rookie phenom, was out of the starting lineup because of tightness in his back. He pinch-hit for Tyler Moore with one out in the top of the ninth and drew a walk from Alfredo Aceves.
Aceves (0-4) struck out Jesus Flores for the second out, but Bernadina doubled to the right-field corner and came all the way from first, sliding safely into home to put the Nationals up 4-3.
Reliever Tom Gorzelanny (2-1) pitched a scoreless eighth and Tyler Clippard closed the game with his third save of the series, striking out Dustin Pedroia to end it.
Boston manager Bobby Valentine stormed out of the dugout during Pedroia...