Actually, come to think of it Korver is 38 already. Doesn't the over 38 rule mean that the Jazz have ALREADY paid for his next year's cap hit? From
https://www.hoopsrumors.com/2018/06/hoops-rumors-glossary-over-38-rule.html
"The Over-38 rule generally takes effect when a free agent signs a long-term contract that extends beyond his 38th birthday. In these cases, the salary in the year(s) after the player turns 38 is considered deferred compensation, and is applied to the years earlier in the contract, when that salary is actually being earned."
So that would imply Korver retiring or not has zero impact on the Jazz's cap situation for next year. Or am I missing something? I don't know much about this rule.