The safety position just lost a lot of depth as Idrees Bashir is out for the season. ESPN's Len Pasquarelli describes the injury:
Bashir, 28, was injured on the opening kickoff while attempting to make a tackle. The Lions placed him on injured reserve Monday afternoon, and he will undergo surgery in the next few weeks, when swelling in the knee subsides.
Losing Bashir is a huge blow to depth at safety considering Daniel Bullocks is already out for the season. With that, rookie Gerald Alexander had to step in as a starter, and Bashir has been filling the role of backup for both free and strong safety. Losing him means that the Lions are one play away from Greg Blue. Who?
Hopefully this is the only season-ending injury we see for a while as the injured reserve list has now grown to 7 players. That's nothing compared to last year, but as the season goes on we will start to see more players go down with injuries simly from the wear and tear.