
The win gave the Nats the series win. Washington has won seven of its last nine after stumbling out of the gates to a 7-13 start.
Scherzer (2-3) was cruising along, staked to a 7-2 lead after an RBI single by Yunel Escobar and RBI groundout by Harper in the seventh added what turned out to be two important insurance runs.
Scherzer gave up back-to-back singles to Dee Gordon and Martin Prado to lead off the eighth before Giancarlo Stanton hit a three-run homer to left-center to cut the margin to two.
Tanner Roark came in and got into more trouble, giving up a pair of one-out singles before striking out Ichiro Suzuki and getting Adeiny Hechavarria to ground into a force out to end the inning.
Closer Drew Storen had some of his own self-created drama to work through in the ninth, hitting leadoff man Donovan Solano and giving up a single to Gordon before retiring the final three hitters in order, including getting Stanton on a swinging strikeout for out number two.
Harper’s homer barrage gives him eight on the season. Harper also drove in five runs.