You mentioning him as a experienced vet will make him pretty valuable to help Tevi for whatever games he has to play.
The best case scenerio is Tevi plays great and maybe actually becomes the future LT.
I am guessing they have a good idea of where he is at with the injury rehab. Leno was a good option and he seemed to be very interested. If they weren't comfortable enough with Fisher then I would think they would have just went after Leno....so I am going to trust Ballard here.