Two-time Pro Bowl offensive lineman T.J. Lang announced his retirement on Friday in a social media post.
The 31-year-old Lang was released by the Detroit Lions earlier this month.
"For the past 3,624 days I have woken up with one goal in mind-How can I be a better pro football player than I was yesterday?" Lang wrote in a note attached to his Twitter account. "Well, those days are over now. ... I will forever cherish the great times that I had playing this game."
Lang played 10 NFL seasons -- eight with the Green Bay Packers (2009-16) and the last two with the Lions.