Yeah that would suck. Besides potential race team sponsorship issues, Napa and O'Reilly are two halfway decent parts stores, doesn't seem like a positive for the market to have the under one corporate roof. I'd have to think they would continue to have Napa stores though; that's a very valuable brand, especially among pros.
It says they were looking to spin off Napa anyway, guessing the plan was/is to keep Carlyle and that's why they changed it to be a separate division under Genuine Parts with its own identity instead of a brand under Napa like it used to be. In which case Capps and Gordon's sponsors would go from being essentially the same company to having no direct connection.