NEW YORK -- New York Mets left-hander Steven Matz's planned return from the disabled list on Thursday is off.
Matz experienced renewed shoulder tightness while throwing off a mound on Sunday and again while throwing on flat ground on Monday, and the Mets temporarily have shut him down.
Matz said he is dealing with a shoulder impingement that is causing rotator cuff irritation. He predicted he will pitch again this season. Matz added that surgery will not be required to remedy the issue. It's more about correcting posture.
"Just a little irritation -- it's still bugging me a little bit," Matz said Tuesday afternoon.