After 12 seasons in the NFL, Buffalo Bills Richie Incognito says he is retiring, citing problems with his liver and kidneys, according to reports.

The lineman had not played in a game for a year when the Bills signed him to a one-year contract in 2015. His one-year absence in 2014 came after he was suspended for a bullying scandal involving former Miami Dolphins teammate Jonathan Martin during the 2013 season.

The Pro Bowler sent out several tweets the week leading up to announcing his retirement.

One firing his agency:

Another tweet directed at NFL Players Association and its assistant executive director of external affairs George Atallah saying he’s “done.”

Incognito started in 16 games last season for the Bills.