The Sox are getting just enough out of their rotation , which has a 16th - ranked 4.08 ERA over their 12 - 7 streak .
Their bullpen has become a concern , with a 25th - ranked 4.71 ERA in that time .
The Sox are getting just enough out of their rotation , which has a 16th - ranked 4.08 ERA over their 12 - 7 streak , but their bullpen has become a concern , with a 25th - ranked 4.71 ERA in that time .