MIAMI -- A.J. Pierzynski hit a two-run homer and five pitchers combined on a six-hitter Wednesday to help the Atlanta Braves complete a three-game sweep by beating the Miami Marlins 2-0.

The season-opening sweep was the first for the Braves since 2007. They're supposedly rebuilding, while the Marlins have playoff hopes, but Atlanta outscored Miami 16-3 in the series.

The 38-year-old Pierzynski, playing in his first game with his newest team, broke up a scoreless tie in the seventh inning against Tom Koehler (0-1).

Shelby Miller made his first start with the Braves and allowed four hits in five innings. Brandon Cunniff (1-0) followed with 1 2/3 perfect innings for his first major-league victory.

Jason Grilli, who assumed the closer's job when Craig Kimbrel was traded on the eve of the season, pitched a 1-2-3 ninth for his second save in as many chances.