wrong restructuring?

[BeastsoftheNFCeast]

Is there a rule on when players retire that their signing bonus left to be paid out does not count, or anything similar to that? If not, we are dumb as hell for restructuring Thomas and Jansen, they have a combined 32 million dollars left in signing bonus money, both are 32 years old, and both are injury prone in general and are coming off season ending injuries. Essentially we cannot let these guys go no matter how bad they get due to injuries and age, and they both eat up alot of cap space. In my mind, this was a dumb move on the skins part.