4) Immanuel Quickley
The Spurs have already been linked to New York Knicks point guard Immanuel Quickley, who is set to become a restricted free agent next summer. He is expected to receive a big payday, increasing the likelihood that he will get dealt before the trade deadline rather than the Knicks risking losing him for nothing.
The Spurs will have significant cap space, so they could technically just wait until next summer and make him a big offer, though they may look to trade for him now rather than risk bidding with another team. It's easy to see why, despite him coming off the bench, Quickley is a starting-caliber point guard who is known for his impactful defense but is also an efficient 3-point and mid-range shooter with playmaking chops.
At 24, he'd give a team with cap space a long-term fit at point guard, and San Antonio could be that team. After all, they have the assets needed to trade for him, or they can pursue him in restricted free agency, though having potentially two top-10 picks could complicate that.
San Antonio could target a point guard in the draft, and they could even throw whoever was selected into the fire and have him start on day one. As a result, the Spurs may wait until the summer to make a decision about whether to pursue Quickley.