There was definitely reporting that the defect was congenital and, I believe, present in both knees. I don’t remember if the “when, not if” discussion was a reported opinion of doctors, or board speculation. And, I don’t know if a doctor would recommend preemptive surgery even if the doctor thought the other knee would blow eventually.
The Tatis situation really does seem like wishful thinking on his part. Five dislocations in one season? I doubt exercises are going to fix that. I remember Chris Webber had a problem with recurring shoulder dislocations and tried to avoid the knife but eventually had to do the surgery.
I'm not suggesting that I am privy to any discussion between Manny and his doctors. It is my understanding that he was made aware that the same congenital condition that caused his first two knee injuries was present in both knees. I also recall it being framed as when and not if his other knee would fail. I accept that my recollection could be faulty.
Will be interesting to see if Vespi pitches his way onto the 40 man or into a Rule V selection. Seems to me he might fall in between…..someone who isn’t protected because the O’s brass don’t think he’ll stay with a drafting team for the full season.