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.