Description: 49ers cornerback Chris Culliver has been diagnosed with a torn ACL in his left knee. SOURCE: Ian Rapoport, NFL.com
Insight: He'll miss the entire 2013 campaign. Culliver notched 47 tackles and two interceptions last season. Tramaine Brock and Perrish Cox will have to play a bigger role in the secondary now that Culliver is gone for the year.