The first rough patch of the Mets’ home opener came before the game even started. 

And team owner Steve Cohen is acting fast to correct it.

The large, square, red-lettered on a white background patch added to the jersey sleeve Friday as part of a sponsorship deal with New York Presbyterian Hospital was lambasted by fans over the first hours after it was revealed.

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Cohen said he and New York Presbyterian’s chief executive officer Steve Corwin agreed to change the patch via email.

“They’re Phillies colors,” Cohen said before the game. “He agreed and I agreed that it should be more Met-appropriate.”

Cohen declined to share any financial details of the partnership. It is the first year that MLB is allowing jersey patches as advertising. 

“It was a complicated deal based on that and other assets,” Cohen said. “We have a great partner in New York Presbyterian. We’re excited by that.”