Stephen Strasburg pitched as badly as his teammates have been playing.
Strasburg gave up a career-high seven runs in five innings Tuesday night and the first-place Washington Nationals' losing streak reached five games when they were beaten by Ricky Nolasco and the last-place Miami Marlins 9-0.
Nolasco (10-12) allowed five hits in his third career shutout and eighth complete game.
Strasburg (15-6) came into the game with a streak of 27 consecutive scoreless innings against Miami in five starts since last September. But he gave up a homer to his second batter, Justin Ruggiano, and trailed 5-0 by the third inning.
Strasburg, who had won his past four starts, allowed five earned runs, gave up nine hits and struck out only three. He leads the NL with 186 strikeouts.