Adam LaRoche circles the bases after the first of his two home runs against the Orioles. (USA TODAY Sports)
WASHINGTON (AP) - Adam LaRoche homered twice and drove in four runs, and the Washington Nationals enjoyed a rare offensive outburst at the expense of the Baltimore Orioles in a 9-3 victory Tuesday night.
LaRoche, Tyler Moore and Roger Bernadina connected off Orioles rookie Kevin Gausman (0-2). LaRoche added a solo shot in the eighth off Troy Patton.
It added up to Washington's highest-scoring performance since a 10-3 win over Miami on April 15. The Nationals hadn't scored more than seven runs in 29 games since April 25.
Chris Davis hit his major-league leading 17th homer for the Orioles, and J.J. Hardy also went deep. But Baltimore's franchise-record run of scoring at least five runs in 10 straight road games ended.
Washington built a 7-3 lead in the fourth inning for right-hander Nathan Karns in his major league debut. But Karns couldn't make it out of the fifth.