Yahoo Sports NFL on J.J. McCarthy

From the article

McCarthy's reported immaturity has stunned Vikings staff; one instance that 'did not sit well internally' occurred when the 2024 first-round pick celebrated a touchdown against Dallas 5 yards before crossing the line of scrimmage during a December game, despite being told not to in practice. McCarthy admitted he was warned not to repeat the celebration and said, 'I did it in practice, and I was told not to do it. So, just me being who I am, it's like, Oh, now I'm more enticed to do it.' Head coach O'Connell made clear he was unhappy about the celebration.