Mets' Thomas Szapucki: Dealing with shoulder impingement

Szapucki was held back in extended spring training as he works his way back from a shoulder impingement, MLB.com's Jonathan Mayo reports.

With the graduation of Robert Gsellman, Szapucki is the Mets' top pitching prospect, and while injuries have been his primary wart to this point, it had been back and neck injuries that plagued him in the past, so this is the first arm-related concern. Szapucki has the potential for a plus fastball and plus curveball from the left side, but the risk is also through the roof. He is expected to report to Low-A Columbia when healthy.