Jacob deGrom exited an intrasquad game early because of tightness in his back, and the New York Mets' ace was scheduled for an MRI.

Mets manager Luis Rojas said a frustrated deGrom left Tuesday night's camp outing after only one inning at Citi Field. The team was awaiting test results Wednesday, and deGrom is day-to-day.

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Any significant injury to the two-time Cy Young Award winner would be an enormous blow to New York during a season shortened to 60 games due to the coronavirus pandemic. The right-hander had been scheduled to start on opening day July 24 against Atlanta, but that appears in jeopardy now.

The Mets already are minus No. 2 starter Noah Syndergaard, who will miss the entire season following Tommy John surgery.

Last year, deGrom won his second consecutive NL Cy Young Award after going 11-8 with a 2.43 ERA in 204 innings pitched. He led the National League with 255 strikeouts.