The concern I have after reading the quote from CDD is that the coach has become frustrated with the durability of Zach, so much that he's calling him out for what seems to be a 'lack of toughness' perception from CDD. If CDD feels strongly enough about this that he's gonna put this into the media, then he's probably been dealing with this for a long time.
It reminds me of my time in the Army when you had a couple guys that ALWAYS had something wrong with them, and would do anything to get themselves to sick call, and never got that they were letting people down that counted on them. You know, that person that has a fever when their temperature is 99, or 98.7, for that matter.
I get that a deep bruise is tough to drive thru, and can often be debilitating. That isn't the newsworthiness of this, but IMO, it's that CDD has decided that it may be a risk to put too much trust into someone that seems to have a pattern of always having something that will hold him out of practice or games.
Maybe I'm reading too much into this...(probably, but still)