02-02-20 12:46 PM - Post#298390 In response to HARVARDDADGRAD
Wow---that sounds like a missed cartilage tear in the knee. Cartilage does not heal itself, it has to be sutured to prevent fragments from coming loose and causing pain and inflamation. What requires rehab are the surrounding muscles after surgery (I'm a vet with 2 scopes both from playing basketball). It sounds like they missed a tear on the MRI and then simply didn't fix it.
On the good side, if his only injury was cartilage and it now is fixed, he should have a trouble free return to action when he is ready. Quite unlike a torn patella and kneecap injury such as Begley had.