"He was pretty good [Sunday]; threw some good changeups and was pretty good," manager Joe Girardi said. "You want to build from his last start, continue to build this kid up.
"I'm very happy with his progress so far and the way he's went about it. It's been a long time since he's pitched in the big leagues but he's went at it the right way."
Pineda, 24, was 9-10 with a 3.74 ERA in 28 starts for the Mariners in 2011. He missed all of last season due to the labrum injury, which he suffered in Spring Training with the Yankees.
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.