Michael Pineda has had a rough spring for the Yankees, following his acquisition from the Mariners for Jesus Montero. His outing Friday night against the Phillies, a 71-pitch marathon that didn’t get out of the third inning, had the Yankees schedule a shoulder MRI for early Saturday.

The results were not positive:

Pineda to dl with right shoulder tendonitis

— Daniel Barbarisi (@DanBarbarisi) March 31, 2012

David Waldstein has additional information:

Pineda goes on 15-day DL and Yankees will be conservative with him. Garcia officially in rotation and will probably pitch in fifth game.

— David Waldstein (@DavidWaldstein) March 31, 2012

“Be conservative”. That means the Yankees could be lucky to see Pineda back in action before the All-Star break.

The Yankees’ rotation is thus set: CC Sabathia, Hiroki Kuroda, Phil Hughes, Ivan Nova and Freddy Garcia. The Yankees will also have Andy Pettitte in a month or so.

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