Jacob deGrom, the reigning National League Cy Young Award winner, was scheduled to start for the Mets against the Cardinals in St. Louis on Saturday, but his plans have been rerouted.
DeGrom was sent back to New York to have a magnetic resonance imaging examination on his right elbow on Saturday after experiencing tenderness on Thursday.
Manager Mickey Callaway told reporters in St. Louis that deGrom’s right elbow was “barking” after a throwing session on the team’s off day.
DeGrom’s scheduled start had already been moved by a day because he was said to be battling strep throat. In 2010, he had Tommy John surgery to repair a ligament in his right elbow.
DeGrom, 30, signed a five-year contract extension worth $137.5 million two days before the 2019 season opener, and has struggled in his last two starts.
After shutting out both the Washington Nationals and the Miami Marlins in his first two games, deGrom, who posted a 1.70 earned run average last year, allowed an uncharacteristic six earned runs against the Minnesota Twins at Citi Field and then gave up three earned runs in Atlanta last weekend.
He is 2-2 on the season with an E.R.A. of 3.68. The Mets are 10-8.