Any heart surgery is serious for a person. Of course. I am just wondering why you assume it would make him worse at basketball?
Heart surgery and being a professional athlete ... the two together worries me.
They need to be at their absolute best physically to fulfill their career. Can Jeff Green be his absolute best? Or will be an 8/10 physically instead of a 10/10? Will the injury effect his mentality on the court? Will he (even more) passive than before? Will he be comfortable pushing his body when he is tired through a long schedule? Through injuries?
It's not that I assume Jeff Green will be worse, it's that I don't know. He may be able to (1) resume his career and not miss a beat, or, (2) he may come back and play at a lower level. There is a risk there. It's not like he was a sure thing (prospect) before the heart-surgery either.
What I am uncomfortable with is the risk/reward of his contract demands. I want a one-year contract or a much lower multi-year deal (than he would've gotten pre-heart surgery) to balance out that increased risk.