This had fallen a bit by the wayside, but a league source has reportedly indicated that 49ers cornerback Perrish Cox will not be suspended in connection with his 2010-2012 sexual assault case. Although Cox was found not guilty, the NFL's personal conduct policy allows for discipline even if a person is found not guilty. The league was reportedly reviewing the case and informed the 49ers of their decision.
With this issue off the table, the focus will be entirely on football moving forward. From a purely football perspective, it sounds like Cox has impressed the coaching staff thus far. Defensive coordinator Vic Fangio has praised his work as a nickel and outside cornerback. Initially it seemed like the competition for playing time would be between Cox, Chris Culliver and Tramaine Brock. However, Brock has focused on the outside cornerback role, while Cox has gotten work at both positions.
The most recent depth chart lists Tramaine Brock ahead of Perrish Cox, but it is worth noting that the depth chart only shows left and right cornerback. It does not provide the nickel depth chart, which would seem to be Carlos Rogers first and Perrish Cox second. Rogers plays outside in the base defense, but as most are aware, he moves inside to cover the slot receiver when the team goes to their nickel defense.