Look at your OF for 2015...
Cespedes, Castillo, Betts, Craig, Victorino
Cespedes is an impending FA and could be dealt by mid season if the sox suck again.
Castillo hasn't played continuous baseball for 3 years, he's probably not playing 162 next yr.
Betts is probably going to be in your IF next yr
Craig and Victorino cannot stay healthy.
I find it hard to believe that Bradley gets moved because he at the very least offers elite D as a 4th OFer. 2015 will be his final option yr, so he wont be part of a roster crunch if he has to get moved down. And chances are, he spends significant time in your OF in 2015.