Michael Pineda has a tear in his right labrum and will undergo arthroscopic surgery next Tuesday, according to Mark Feinsand of the New York Daily News (Twitter link). The 23-year-old will likely miss a full year, MLB.com's Bryan Hoch tweets. The Yankees acquired Pineda in an offseason trade that sent their top hitting prospect to the Mariners, but the right-hander has yet to pitch his first inning in pinstripes.
On paper the Yankees have a relatively deep rotation even without Pineda. Andy Pettitte continues working his way back to the Major Leagues, where he’s expected to join C.C. Sabathia, Hiroki Kuroda, Ivan Nova, Phil Hughes and Freddy Garcia.
Jon Paul Morosi of FOX Sports examined the Pineda-Jesus Montero trade earlier today (before this afternoon's news), declaring the Mariners the early winners of the swap. Yankees GM Brian Cashman says Pineda was healthy when the Yankees acquired him in January, Hoch tweets. Pineda, a rookie in 2011, won't be arbitration eligible until the 2013-14 offseason.