The Atlanta Falcons selected Houston, 30, in the second round of the 2007 NFL draft. He most recently played for the Detroit Lions, but did not play last season after undergoing toe surgery. Houston signed a one-year contract with the Panthers in June.
In 2013, Houston started 12 games for the Lions, recording 38 tackles and two interceptions. He will retire after playing 99 games in his career, starting 91 of them, and collecting 324 tackles and 13 interceptions.
The Panthers will play their first preseason game on Aug. 14 against the Bills.
- Erin Flynn