Nationals pitcher Stephen Strasburg (5-9) endured a rough outing as he suffered his ninth loss of the season Tuesday night against the Nationals.

Strasburg served up a grand slam to Alex Avila a 1-1 tie in the sixth inning to break. The right-hander permitted five runs on six hits and three walks while striking out seven over seven innings of a 5-1 defeat.

Strasburg has not won a start since July 7. He is 0-3 with a 5.25 ERA in his last four starts. He is scheduled to make his next start Monday at home against Atlanta. He is 4-4 with a 1.68 ERA in 11 starts at home.