Chris Davis is horrible. Horrible at everything, the dude is a power hitter and that is literally all, yes he still has time to improve but right now he doesn't even take walks and he is going to set single season K record. If I were Red Sox no way in hell I would give up a potential front end of the rotation guy for Davis, especially considering Buchholz would be very valuable to Texas with how bad their rotation is.
and Delcarmen isn't exactly a throw in, he has pitched well the past few seasons including this year. I would pass on that.