Terrell Owens has become the latest NFL player to learn that Twitter isn't necessarily free.
The Cincinnati Bengals wide receiver has been fined $5,000 for violating the NFL's prohibition on using social media shortly before games, a league source told NFL Network insider Jason La Canfora.
Owens acknowledged that he broke the rule by sending out a tweet an hour before Cincinnati's 24-21 loss to the Tampa Bay Buccaneers on Sunday.
Owens' tweet read: "A lucky fan wearing my jersey 2day will get a signed football by Me & Ocho Cinco! My asst will pick U out!! Good luck!"
Players and coaches are prohibited from using social media 90 minutes before games, during games and shortly afterward.
The Associated Press contributed to this report.