Kemba Walker
Unlike Butler, Kemba Walker is the face of the Charlotte Hornets, which has stood the case since they were the Bobcats. Losing him is disastrous for this franchise, and like the others, there is a realistic chance for him to leave.
The Hornets have attempted to add pieces around Walker, but none have approached his talent caliber. Nicolas Batum was once a top addition, but making $24 million to average fewer than 10 points per game leaves much to be desired, and he has two years left on this long-term deal. Jeremy Lamb came into his own for 15.3 points, but the scoring options are few.
Attribute this to disappointing draft picks, including Frank Kaminsky and Malik Monk.
Charlotte has no cap space to make free agent moves, as well. Unless they are creative via trade, Walker might re-join a similar, if not identical team.
Without Walker, the Hornets will sink to the bottom of the NBA. Not as dramatically as the Cavaliers since they were in the NBA Finals, but this could become a playoff team on the brink to a 60-loss group by 2019-20.
If Walker goes to the New York Knicks, he brings legitimacy to their point guard spot. If he teams with a superstar forward, it would be, by far, his best teammate since entering the NBA. Who knows how much better this 2011 NCAA Tournament champion would play.