Major League Baseball has suspended New York Yankees infielder Jazz Chisholm Jr. for one game and fined him an undisclosed amount following his conduct during Thursday night’s game against the Tampa Bay Rays.

Chisholm was ejected in the seventh inning by home plate umpire John Bacon after disputing a called third strike on a full-count pitch from Mason Montgomery, which appeared to be low. Frustrated, Chisholm later posted on X (formerly Twitter), “Not even f—ing close!!!!!” before quickly deleting the message.

Speaking to reporters after the game, Chisholm acknowledged his outburst. “I didn’t think anything I said was worthy of an ejection — at first. But probably, after that,” he said. “I’m a competitor. When I think I’m right and I hear something that doesn’t make sense to me, I get fired up. I lost my emotions. I’ve got to be better. I’m mad at myself for that.”

Michael Hill, MLB’s senior vice president for on-field operations, said the discipline stemmed from Chisholm’s “conduct, including his violation of Major League Baseball’s Social Media Policy for Major League Players.”

MLB rules prohibit the use of electronic devices during games and ban posts that question the integrity or impartiality of umpires.

Chisholm appealed the suspension, allowing him to play in Friday night’s 1-0 victory over the Rays. He started at second base and went 0-for-4 with two strikeouts.