I don't think it's that they don't want it, as much as it is they are not willing to risk the longer term goal to get it.
I think the double header + weather really messed things up. Yesterday's game was the real day off, as skipping the back end of the double header wasn't really a resting opportunity per se.
As tough as it is to punt two games at this point in the season, I'd rather see the team prepare for the offseason more than anything. Plus it's tough to know what's really going on the clubhouse in terms of Edwin's finger, Donaldson's wrist, etc.