Delmas has been excellent since returning from a long injury absence. However, he suffered an injury Sunday, and there is concern within the organization about when he will be back.
The Lions are looking to acquire a safety with starting experience and are expected to canvass the league ahead of Thursday's trade deadline.
Delmas suffered an injury to his left knee in the third quarter against Seattle on Sunday. Coach Jim Schwartz reported Delmas as sore and day-to-day. The Lions are likely weighing the fact that Delmas underwent surgery on the same knee in August.
The Lions are also missing starting safety Amari Spievey who has not returned after suffering a concussion against Chicago in Week 7, leaving Erik Coleman and Ricardo Silva and John Wendling at safety.