Wheeler (elbow) felt some "tenderness" in his arm following his last bullpen session, James Wagner of the New York Times reports.
Pitching coach Dan Warthen said he believes it's just a matter of Wheeler breaking up some scar tissue, and Wheeler is scheduled to resume throwing later this week, but the team will be cautious with his progression from there. It sounds like Opening Day is very much in question. The Mets are looking to limit Wheeler to an innings total in the low-100s in his first season back from Tommy John surgery, per Warthen.