ATLANTA (AP) -- Bryce Harper had two homers, including a grand slam, among four hits and the Washington Nationals overwhelmed Julio Teheran and the Atlanta Braves 14-4 on Wednesday night.
Harper drove in five runs. His third-inning grand slam just cleared the reach of leaping Braves center fielder Ender Inciarte. Harper's seven career homers off Teheran are his most against any pitcher.
Ryan Zimmerman added an eighth-inning grand slam off Ian Krol, sending some Braves fans for the exits at new SunTrust Park. The Nationals had 20 hits.
Washington's Joe Ross (1-0) allowed three runs on six hits in seven innings in his 2017 debut.
Teheran (1-1) allowed seven runs on seven hits in four innings.
Nationals outfielder Jayson Werth left the game during a third-inning at-bat with a groin spasm. He appeared to suffer the injury on a check swing.
Atlanta's Freddie Freeman walked in the first and hit his sixth homer in the third. That gave Freeman 12 consecutive plate appearances in which he reached safely, an Atlanta record. The streak ended with Freeman's sixth-inning groundout to shortstop Wilmer Difo. Freeman had a run-scoring single in the eighth.
Jeff Burroughs reached safely in 11 straight plate appearances in April, 1978. The Braves did not immediately have records for that statistic from their time in Boston and Milwaukee.
Nationals manager Dusty Baker said before the game he was removing Blake Treinen from the closer's role. Right-handers Shawn Kelley and Koda Glover will share the job. Treinen, who has a 7.11 ERA with three saves in four chances, will shift to a setup role.
The last time the Nationals hit two grand slams in one game was July 27, 2009 at Milwaukee, when Josh Willingham hit both.