It can't happen!
Adams makes $25M per. The Spurs can't just add a $25M player to the damn roster. Draft picks are not a Get Out Of Cap Jail Free card.
I don't know what leagues sources would tell Amico that the Spurs can trade a pick for a player when they're over the cap.
Figure out what player(s) the Spurs would have to send out to balance the salaries in that deal. It can't happen.
Like I said, that's a player swap with a pick thrown in as a kicker. Beli and Bertans are both "established veterans". They would be trading two established veterans for one that they thought might move the needle, and using the pick(s) to sweeten the deal.