If he's coming next year, we'd have to trade for him (since he's under contract for one more year)... but the idea that the Spurs would
accept any trade package from us not involving any of the Big 4 is as lol as the idea that he'd ever accept an MLE or minimum contract.
The Marlins were apparently just bored and repeatedly trying to come up with Stanton
trade packages under the assumption he'd never
accept a deal out of Miami, anyway, and then whoops, one of the
trades was completed.