The Boston Red Sox's bullpen has been stellar all season. It hasn't just been those two, though; everybody in the Sox bullpen has played their role all season, leading to the Sox having the second-best bullpen ERA this season with a 3.47. The Red Sox currently have the lowest bullpen ERA in the American League this season (3.45). Which lefty reliever should remain with the Red Sox for their hopeful postseason run? In all likelihood, the Red Sox will go with Murphy, at least to start.