A team would have to be in pretty bad shape to take Rattler off the practice squad. They would have to put him on their 53 man roster. Have you seen how many interceptions were dropped by Oakland today?
Rattler wouldn't clear waivers much less be on a practice squad to be signed. If you don't see a young QB with worlds of potential that played a pretty good game despite no help from those around him, I don't know what to tell you.