But for the third straight game, the Phillies staged a late rally to pull out a victory, claiming their first home-series sweep of the season.
Mayberry then scored the tying run on a Carlos Ruiz sacrifice fly. Fontenot went to third on the play, then slid home with the game-winning run on a solid liner to right-center field off the bat of Rollins.
Michael Schwimer (2-1) earned the victory after tossing a scoreless top of the 10th.
Milwaukee's Ryan Braun forced extra innings with a game-tying, two-run shot in the eighth off Anthony Bastardo -- his National League-best 28th of the season.