Matz has a bone spur in his elbow that is likely causing his discomfort, Mike Puma of the New York Post reports.

EDGE Analysis

It appears the Mets have identified the cause of the discomfort for Matz's elbow, and it can't be fixed without having surgery, so it seems as though Matz will try to pitch through it. Matz is 7-3 with a 3.29 ERA and 1.19 WHIP this season, so his status is definitely worth monitoring over the next few days.