I'm not buying into the Red Sox being road chalk against the Orioles in a pitching matchup of lefty Martin Perez versus Alex Cobb.
Cobb has been the better pitcher this season with a 3.76 ERA. Perez has a 4.07 ERA and walks too many batters. The Red Sox bullpen is bad plus depleted. 
The Orioles have scored 5 or more runs in 14 of their last 18 games. They have a winning record this year against southpaws. 
Baltimore averages 4.9 runs per game, which ranks 11th. Boston ranks 18th averaging 4.6 runs. The Orioles also have hit more homers than Boston.