Key players with tough calls: Will they stay or will they go?

Villanova's Josh Hart is one of many facing a tough choice: Another year in school or head to the NBA now? Derik Hamilton/USA TODAY Sports

The list of those still testing the NBA waters has begun to shrink. There are those who have already decided to sign with agents (such as Syracuse's Malachi Richardson and Kansas' Cheick Diallo) and those who have opted to withdraw after failing to earn an invite to the NBA draft combine (like North Carolina's Justin Jackson, Villanova's Kris Jenkins and Creighton's Maurice Watson).

That still leaves plenty of guys in limbo leading up to the May 25 deadline to withdraw and maintain college eligibility.