Detroit already had limited depth in their secondary, so this is very disappointing news for them and Bentley.
Bentley, 25, is in the third year of his four-year, $2.649 million rookie contract and will make a base salary of $570,000 this season. The Lions used a third-round pick on Bentley back in 2012.
Last year, Bentley appeared in 13 games and recorded 29 tackles and five pass defenses.
The Lions recently brought i veteran CB Champ Bailey for a visit, so this could be something to keep an eye on in the coming days.