From the Jaguar’s website:

Joe from Gautier, MS
I just read that Ciatrick Fason was signed. He certainly would be a long shot for a roster spot at this point. Does he have practice squad eligibility?

Vic: Fason knows why he was signed. The Jaguars have a preseason game to play, they’re light on “bubble” backs and they needed someone to help Chauncey Washington shoulder the load on Thursday. Fason is a pro. He knows what this is all about and he also knows it’s another chance to put himself on tape. He’ll have a chance to make an impression on the Jaguars and on any other team that might be in the market for a running back. Pro football can be a cold business, but at least they give you the truth. They don’t sit in your living room with your mother and father and try to make you believe you’re the most important person in the world.