The truth cost Clay Matthews.

The Rams linebacker was fined $12,500 by the NFL, according to ESPN, for his tweet on Oct. 15 that commented on growing frustration over league officials’ inability to get calls correct and that chastised Al Riveron, the NFL’s senior vice president of officiating.

“The storyline for the 2019 season continues to be the refs inability to make the accurate and correct calls week in and week out,” Matthews tweeted. “Al Riveron continues to blindly side with his refs and the current status quo. Something must change! Zero accountability. …#throughthewire”

The tweet came the night of the referees’ debacle during the “Monday Night Football” game between the Packers and Lions.

Detroit was called for two suspect hands-to-the-face penalties that extended Packers’ scoring drives and did not see key pass-interference call got their way in an eventual loss. The NFL admitted later the refs made mistakes during the Lions game.

Matthews and the Rams are no strangers to poor officiating becoming a game-changer. They were the beneficiaries of a non-call on a clear pass interference in the last season’s NFC championship game that helped them beat the Saints and reach the Super Bowl.