On the mound, Porcello (10-3) struck out five and limited the damage to solo home runs by Anthony Rendon and Daniel Murphy.
Scherzer (10-5) struck out nine and kept the Red Sox off the board except for Porcello’s bases-clearing double
When Scherzer exited the game after 108 pitches, Mookie Betts provided the Red Sox with their insurance run with a solo shot off Brandon Kintzler in the seventh, his 21st home run of the season.
Bryce Harper hit his 21sthome run in the eighth, and Craig Kimbrel got into some trouble but picked up four outs for his 25th save in 27 chances.
For Game 2 tonight Brian Johnson is on the mound for the Red Sox. Johnson, who is 1-0 with a 3.18 ERA in three career interleague appearances, faces Washington for the first time.Right handed pitcher Tanner Roark pitches for the Nationals in his first career start against the Red Sox.