Trailing 4-3 entering the eighth, the Marlins launched a long ball assault that carried them to a victory in the middle contest of a three-game set against the Phillies.
The next batter, Cameron, also went deep and Dobbs completed the homer parade with another solo shot one out later.
Edward Mujica (9-5) tossed a scoreless eighth to record the win.
Wilson Valdez contributed a two-run triple for the National League East-leading Phillies.
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