The New York Yankees shut down starting pitcher Michael Pineda on Saturday, citing persistent weakness in his shoulder. Pineda did not start the season with the Yankees after initially experiencing the shoulder tendinitis this spring. He was slated to pitch two innings in an extended spring training game on Saturday afternoon in Tampa, and he continued to experience the shoulder weakness that landed him on the 15-day disabled list.

The New York Post's Joel Sherman, who first reported that Pineda was being shut down, exchanged emails with Yankees' General Manager Brian Cashman:

Emailed Cashman about Pineda's setback. Response: "Of course I am concerned - don't have an answer." #Yankees

— Joel Sherman (@Joelsherman1) April 21, 2012

Sherman reported that the Yankees will determine how to proceed with the young righty over the next few days. He will be examined by the team doctor to determine if something beyond the originally diagnosed tendinitis is creating the problem.

For more on Pineda and the Yankees, please visit Pinstripe Alley and SB Nation New York.