I know absolutely nothing about this situation, but I remember that back in the day, this was a common occurrence. There were two groups of people: owners and drivers. Owners changed drivers and drivers changed owners very frequently. Now, many of the "teams" are owner/drivers or family groups which don't change. So, when a change does occur, it seems to surprise a lot of people. If you regularly check out Facebook pages such as "VINTAGE SPRINT CARS,From the Beginning To The 80's..........", you'll see pics of the famous drivers of yesteryear in many different cars, often in the same season. That's just the way it was.