Terry Collins apologized to Jay Horwitz, the New York Mets vice president of media relations, a day after publicly lashing out at him.

"I was out of line for saying what I said at the press conference," Collins said. "... He was just doing his job, and I wasn't doing mine."

Collins didn't plan to reveal after Wednesday's game against the Kansas City Royals that Noah Syndergaard left the game after six innings with elbow soreness. Recognizing that reporters would be suspicious when Syndergaard was not available to speak to media, Horwitz pushed Collins at the conclusion of Wednesday's postgame news conference to disclose the information.

"There wasn't any questions on it," Collins told Horwitz as he prepared to leave the press conference.

After Horwitz prodded him, Collins added: "Oh, Jesus. The puppy dog wants you guys to know that Noah Syndergaard is seeing the doctor. His elbow flared up on him. That's why I took him out of the game."

Collins then walked off without answering inquiries from reporters.