"He felt a little stiffness in his shoulder," Yankees manager Joe Girardi said. "His strength tested out fine after the game, but he is probably going to see our doctors. [That] would be my guess."
Pineda has not pitched for the Yankees since being acquired from the Mariners in a January 2012 trade. He was 2-1 with a 3.32 ERA in 10 Minor League starts this year for Class A Advanced Tampa, Double-A Trenton and Scranton/Wilkes-Barre.
"I think with what he's been through, we're making sure that it's nothing, but I can't tell you 100 percent it's not," Girardi said.
Girardi said that even with the innings limitations, there had been a chance that Pineda would pitch at the big league level this year.
"He was built up to ... where if we needed him at any point, we could use him," Girardi said.
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.