Strasburg (5-1) allowed five hits in 7 2/3 innings, beating Atlanta for the second time this season and improving to 7-1 in his last nine starts against the Braves. He is 10-8 overall against Atlanta.
He reached double digits in strikeouts for the second time this season after fanning 10 Braves on April 20.
Strasburg faded in the eighth, when Dansby Swanson hit a two-run double. Koda Glover struck out Nick Markakis to end the inning and finished the six-hitter for his third save.
