Apparently Ball is gonna have a cartilage transplant in his knee. That means the "new" cartilage will be coming from a cadaver.
So don't be surprised when we hear that Rudy Gay will miss the rest of the season after a "minor knee prodecure".
Yeah also read about this fairly new and experimental procedure.. Dr. Gökhan Meric, a leading expert of the area says that 80% return to the same level but he failed to detail that the study that statement is based on has 4 cases of professional basketball players undergoing the procedure.
I found two of those 4, and likely the only NBA examples:
Jordan Adams in 2016, never played in NBA since, does play as a professional in Europe
Festus Ezeli in 2017, never played in NBA but did play in G League