The New York Mets have been vague about the next steps in Jacob deGrom's potential return to the rotation.

The club said Sunday that deGrom threw a side session and will make another minor league rehab start.

Buck Showalter said he had not watched the side session at Citi Field, and he wouldn't publicly detail where and when deGrom will pitch next.

The 34-year-old has not pitched in the Major Leagues since July 7 last year. He missed the second half of last season because of right forearm tightness and a sprained elbow, and has been sidelined since late in spring training by a stress reaction in his right scapula.

"I've got to operate like it's not going to be here. I'd be stupid if I didn't," Showalter said of deGrom's next outing.