AP

The Panthers made one move to add depth to their secondary already this afternoon, and they might be making another soon.

According to Bill Voth of Black and Blue Review, veteran cornerback Charles Tillman has a partially torn anterior cruciate ligament, and may not be able to return.

The Panthers have been tight-lipped about Tillman’s condition, and previous reports were that his knee was hyperextended in Week 10. Coach Ron Rivera said Monday he wanted to see how Tillman responded in practice Wednesday, but a source said that if he hasn’t dramatically improved, the team’s planning to promote practice squader Lou Young to take his place.

They might have had more time to wait for Tillman, if replacement Bene Benwikere hadn’t broken his leg last week, requiring them to sign journeyman Robert McClain today and put Benwikere on IR.

Tillman has been a valuable addition for the Panthers, but staying healthy has been an issue with him the last several years.

If he doesn’t return, the 34-year-old will have played just 19 games the last three seasons.