Antonio Brown’s future with the Oakland Raiders is in doubt before he even plays a game for the team.

Just days before Oakland’s regular-season opener, on Monday night against the Denver Broncos, Brown, the team’s gifted but combustible receiver, is facing discipline from the Raiders after reportedly threatening to punch General Manager Mike Mayock during an argument about the nearly $54,000 in fines Brown has accrued for missing time in training camp.

“Short and sweet: Antonio Brown’s not in the building today, he won’t be practicing,” Mayock told reporters Thursday at the team’s facility in Alameda, Calif. “I don’t have any more information for you right now, and when I have some and it becomes appropriate, you guys will all get it, I promise you, but that’s it for today.”

Speaking after practice, Coach Jon Gruden said there would be an official announcement later Thursday on Brown’s status.