MIAMI — Jason Heyward hit two solo homers to center and the Atlanta Braves again stymied the Miami Marlins to complete a three-game sweep with an 8-2 victory on Thursday night. Martin Prado put Atlanta ahead to stay with a two-run homer, and Michael Bourn added a three-run homer in the ninth. Mike Minor (3-4) needed 103 pitches to get through five innings but allowed only one run, and four relievers completed a nine-hitter.