I think technically NASCAR owns all the numbers, but teams pay for the right to reserve certain numbers (kind of like a lease I think) For example, right now NASCAR owns the #3, but RCR controls it because they are paying for it yearly. IF RCR quit paying for it, it would go up for grabs to another team, or RCR could sell it to another team. But in the end NASCAR does own the numbers and can refuse to let a certain team buy or sell a number, or NASCAR could forcefully retake ownership of a number and allow another team to purchase it, but I don't think this has ever happened. Clear as mud?
That is how I understand it.
Well then it IS possible for Jr. to still drive the # 8, if the right circumstances take place.
I saw it rumored that IF he goes to RCR he would run the # 33
Jimbo