Baseball Prospectus | Under The Knife: Friday Update: "The statement issued by the Red Sox is tiptoeing around the fact that twice they missed something when it came to Ellsbury. This is a world-class medical staff and this could have happened to anyone, but it did happen to the Red Sox. Ellsbury came out pretty strongly earlier, but was able to get back on the same page... or should we say get back in line? Ellsbury's two distinct rib injuries—separate areas and separate traumas—leave a lot of holes in how this played out. Right now, Ellsbury will head to Tempe to work with the API team to try and get him back to a point of comfort and function. That's going to take at least a couple of weeks and will likely require a rehab assignment to get him some swings. We could be looking as long as the All-Star break before we see Ellsbury back in the Sox' lineup."
FWIW, medical staffs are as in control of their patients as school teachers are in control of the students they teach, and we've seen how that has worked out.