It's 3 surgeries, but this one is different, and after reading somewhat into things, here is what I've learned:
1) His injury is different. The first 2 surgeries were to repair a rotator cuff. This time, it's to repair a different area. A shoulder dislocation means that the bone in the upper arm comes out of the shoulder joint. That's what needs to be put back to the joint. A dislocation is different then a separation. I totally understand that the dislocation is much more serious. This is why the labrum AND the capsule were both damaged. Having said that, it's STILL a different area, which leads me to my next learning.
2) A lengthy rehab process, that will begin with passive mobilization, (like Chad said, brushing the teeth, ETC.) Then the training part where he strgethens, ETC. Then the part of getting back to being where he is as a pro athlete. Unless the case is that he just doesn't want to go through this process again (which I also completely understand, if he didn't want to), it's not entirely impossible. If the surgery goes smooth, and rehab works out the way it should, it could take him 4 to 6 months after to start exhibition games to find out where he stands as far as playing, and if things feel ok for him, he MAY just feel the want to get back out and play.
3) I also learned that, as for all of the battles that Chad is facing, age is NOT working against him as far as the dislocation, but it's in his favor. As a matter of fact, I read that the real threat after repairing the damages, is having the shoulder become dislocated again. The younger you are however, the more prone you are to having this happen. As an athlete gets older, the tissue becomes more stiff and less pliable. That makes the chance for another dislocation, less likely, though not out of the question.
Bottom line is, if Chad decides that he wants to give it another go, and is told he could take that route, he may actually find himself back on the field. It's just all up to whether or not he wants to rehab to the extent that will get him back to the professional level.