I think you are right. He's got one of two tailor-made responses -- "We know Ellsbury never plays at less than full-speed. This current injury happened when he was still rocovering from the prior injury. We're gonna' wait until we're sure he can't get hurt any further." or (maybe less following the facts) "we brought him back before he was fully healed once, and he aggravated the injury. If sore ribs can't keep him from going all out, a statement from the manager isn't going to help either."
The truth here is really tough to uncover. It's unfortunate Abraham says it "seems" cloudy and "I don't think" Francona knows when he could be back. I guess he doesn't have a relaible source willing to shed some light. Were the Sox on board with Ellsbury going to Arizona. Maybe that wasn't the case. Do they have to approve travel and treatment for injured players? Did the inability to see fractures on an x-ray eliminate Ellsbury's confidence in the medical staff? Could the Sox be in agreement with the idea of only bringing him back when he's 100% -- maybe they are contemplating him as part of an off-season trade so they want his value high? But Francona's statements don't seem to help boost his value.