Milwaukee is now 18-27 on the season, and is 4-16 in the month of May.
Starter Wily Peralta lasted just 1 2/3 innings for the Brewers, allowing six runs (four earned) on seven hits.
Ryan Braun hit a solo home run in the seventh, his ninth of the season.
Milwaukee will get Thursday off before hosting the Pittsburgh Pirates in a three-game weekend series.
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