I believe dude talked about a similar deal, but the Mariners have just dealt Robbie Ray to the Giants. Giants are sending Mitch Haniger and Anthony Descalfini, so its pretty clearly just a salary dump by Seattle.
Ray has 3/$73M left on his deal with an opt-out clause after 2024. Haniger is making $20M this year with a $15.5M player option for 2025 that he'll almost certainly pick up. DeScalfini is making $12M.
I'm not sure I care about missing out on this opportunity, but for a fair point of comparison on cost, I think we probably could've gotten Seattle to give up Ray for nothing and kick in at least half the money he's owed.