I think he will be cut before camp, so they don't have to worry about an injury. The only reason they take the risk is if they are very concerned about DL depth / health.
He is stupid, but so was Jolly, and he woke up. It took some jail time to finally do it, but he did. Maybe Guion can be this years Jolly - suspended for the year and forced to watch as the Packers win the Super Bowl.