Former NFL receiver Steve Smith has shared a secret.

He acknowledged on the NFL Network he left his Carolina Panthers’ playbook for his new team, the Baltimore Ravens, to find when he was released in 2013. It’s not unusual for players to share secrets about their former team after being released or waived, but it is difficult to recall anyone talking about it publicly.

“When I came in I had the playbook and said, ‘It will be on my desk, and what you do with it is on you,’” Smith recalled.

Smith said the playbook was missing from his locker for a couple of days before it was returned and he took it home. Smith said he had a copy of the Panthers’ playbook because it was given to him by another player who was cut a couple years before he was released by the team. Smith said he thought the playbook might be helpful if he got into coaching after his playing career.