Yankees pitcher Michael Pineda needs surgery on his right shoulder and will miss the rest of the season, the team announced Wednesday.
Doctors diagnosed the 23-year-old right-hander with a torn labrum and he will undergo surgery Tuesday. He is expected to be out of action for at least a year.
General manager Brian Cashman said Pineda felt a "sharp pain" in his shoulder Saturday after 15 pitches in an extended spring training game in Florida.
The six-foot-seven Dominican came to the Yankees in the winter in a trade, with the Yankees sending top prospect Jesus Montero to Seattle.
But Pineda, who struggled in the second half of last season, alarmed the Yankees during spring training by failing to throw with the same velocity as last year.
An All-Star last season, Pineda was found to have tendinitis in his shoulder after his last spring training start March 30, when he was tagged for six runs in two-plus innings. An MRI at the time revealed no structural damage.
Cashman said an MRI at the time of the January trade also came back clean, adding Pineda has never had a shoulder problem.