Prospect Watch: Who must sign this summer?

The Penguins have deadlines this summer to sign a few of their prospects.

Three of the Penguins' college prospects -- forward Nikita Pavlychev and defensemen Will Reilly and Ryan Jones -- are currently in their final year of college hockey and will turn pro next season.

The Penguins retain exclusive negotiating rights for all three until Aug. 15, 2020. If the Penguins pass on signing any of the three by then, or if any of the players don't want to sign with the Penguins, they would become an unrestricted free agent after that deadline.

College players can't sign contracts and retain their eligibility, so they would have to sign the deals once their seasons end. Depending on when their seasons…