The Red Sox scored all the runs they would need to beat the Phillies during the first three innings at Fenway Park Monday night.
Phillies starter Tyler Cloyd allowed six runs on nine hits in just 2 1/3 innings against Boston, which went on to win the interleague game, 9-3.
The Red Sox jumped out to a 3-0 lead after one inning on home runs by Dustin Pedroia and Mike Napoli.
The Phillies could not muster much offense against Alfredo Aceves, who got the spot start when ace Clay Buchholz was scratched due to inflammation in his shoulder. Aceves made the most of his opportunity, allowing just one run on seven hits over six innings of work.
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Boston improved to 32-20 on the year with the win. The Phillies, who can't seem to climb all the way back to the .500 mark, fell to 24-27 and are now 6 1/2 games behind NL East-leading Atlanta.
Domonic Brown hit his 10th home run of the season for the Phillies in the eighth inning. By the time Brown hit the two-run shot, the Red Sox were out to an 8-1 advantage.
The teams play their final game in Boston tonight before heading south to play two games at Citizens Bank Park Wednesday and Thursday.