It doesn't really speak against any of the QBs and it's just the team covering it's bases.
Here's what I think the logic behind the signing is.
The team is still unsure and uncommitted to Alex Smith so if Smith doesn't show any significant signs of growth this season than the team will cut him loose go with CK and have JJ as the backup.
If Smith shows some serious signs of growth and plays at a high level they'll continue to go with Smith, CK will be the backup, and JJ will likely be cut loose.
Tolizen they'll likely gamble with and put him on the practice squad. If he doesn't get picked up and they still like him he'll be back on the roster the following year.
[ Edited by Jikkle49 on Mar 24, 2012 at 9:22 AM ]