5:12 PM ET
ESPN News Services
DeGrom underwent an MRI, which showed inflammation in his right lat. He will refrain from throwing for the next few days, the team said.
“He let us know earlier today that he had some tightness on his right side,” Mets manager Luis Rojas said about three hours before game time. “I saw him before coming to the field, and he was stretching, trying to feel his right side a little bit, and that’s when we started discussing whether he’s going to start or not.”
Rojas said the issue was not evident before Tuesday.
DeGrom, a two-time NL Cy Young Award winner, has been baseball’s most dominant pitcher this season, with a major league-best 0.51 ERA in five starts, 59 strikeouts in 35 innings and just four walks. Still, he is just 2-2 as New York continues to have trouble scoring runs for him.
The 32-year-old right-hander has reached 100 mph on 46 of 473 pitches this season and lowered his career ERA to 2.55, overtaking Hall of Famer Tom Seaver (2.57) as the Mets career leader.
Right-handed reliever Miguel Castro was to start in deGrom’s place.
The Associated Press contributed to this report.