The Marlins fell behind by a run and were down to their last strike in the ninth when Gaby Sanchez sliced a 1-2 pitch from Brewers closer John Axford into the right-field seats, tying the score at 6-6.
Wade LeBlanc (1-0) picked up the win with a scoreless ninth and Heath Bell secured the Marlins' victory with his 18th save, as Miami triumphed following a pair losses in their four-game set against the Brewers.
Norichika Aoki and Aramis Ramirez each provided two hits and an RBI for Milwaukee.
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