4: Christian Wood
Anyone who has watched Christian Wood play knows he is a gifted player. Despite his obvious talent and impressive production, he has bounced around the NBA throughout his career. And Dallas likely won't be his last stop since Wood played a smaller-than-expected role on a team that ultimately failed to make the playoffs. Meanwhile, the Spurs may need help at center next season, depending on whether they land the number one overall pick, and may look to use some of their cap space if they don't.
Wood might not be San Antonio's first option in a free agent class featuring numerous talented centers, but he could be an option. That probably wouldn't be a good thing. Wood has yet to sign a long-term deal, despite being 27 years old, and he probably wants the job security of a long-term contract after previously going undrafted. That would be understandable, but the Spurs shouldn't be the team that gives him a big payday.
After all, he would likely want at least $15M annually, and the Spurs would be better off investing that money elsewhere, such as in Timberwolves center Naz Reid. Reid is four years younger than Wood and has been more impactful on a team that made the playoffs. Or, the Spurs can play wait-and-see with the center position.
They could keep Zach Collins as the starter, with Charles Bassey as the backup (once healthy), while adding another center for depth. That would allow them to be respectable at the five without committing to anyone long-term as they figure out who should be the starter going forward.