Mets starter Jacob deGrom (2-2) was tagged for six runs, five coming via home runs, on eight hits in five innings on Friday in a loss to the Yankees.
First baseman Mark Teixeira hit two two-run homers and center fielder Jacoby Ellsbury added a solo shot off deGrom.
"I was throwing the ball fine in the bullpen and when I went in the game I don't know if it was a little adrenaline or something but I was leaving the ball up," deGrom said.
DeGrom more than tripled his ERA to 2.96 on Friday.
DeGrom did not allow a run during his previous two starts, winning both.
DeGrom will look to get back on track Thursday against in his next start against the Nationals.