Source: Syndergaard has sprain

SAN FRANCISCO -- Top prospect Noah Syndergaard has been diagnosed with a sprain of his left, non-throwing shoulder as a result of Thursday's plate collision in Las Vegas, a source told ESPNNewYork.com.

The degree of the sprain was not yet clear.

"Noah is undergoing further tests today," Sandy Alderson told ESPNNewYork.com. "I hope to have something more definitive later this evening."

Syndergaard had been dispatched for X-rays on Thursday night after colliding with a baserunner at the plate after uncorking a wild pitch. He departed the game in the first inning.

Syndergaard had just returned from a DL trip for a forearm strain.