Strider (2-2) left with two outs and runners on the corners in the sixth inning. Left-hander Dylan Lee struck out Cal Mitchell to end the threat.
Kenley Jansen pitched a scoreless ninth to earn his 17th save.
Atlanta's winning streak is the longest by a National League team this year. The Braves' last nine-game winning streak came Aug. 13-22, 2021. The Braves have outscored the opposition 59-23 during that streak. Atlanta has won 13 of its last 17.
Pittsburgh has lost four straight games.
The losing pitcher was rookie Roansy Contreras (1-1), who pitched 4 2/3 innings and allowed four runs on eight hits, one walk and seven strikeouts.