I don't see JO agreeing to a full buyout of his contract; why would he?
Really, I don't see him agreeing to any buyout, but let's say he agrees to a buyout of $9 million on the approximately $11.5 - $12.0 million his contract guarantees him.
That means that we'd have paid $4.5 million this year for no possible chance at a playoff contribution, and will have $4.5 million applied to next year's cap, as well.
To me, that's not very smart business. If surgery is likely to help JO, I'd rather have him contributing next year (and maybe in this year's playoffs) for around $6 million each season, rather than playing for somebody else for $4.5 million.