Fish@Bat unearthed the story and you can read about the Marlins Grand-Am sponsored race car there:
I know that race fans are very brand loyal and they tend to support the product that is the major sponsor of their favorite car. But I don't see how this will help the marketing efforts of the Marlins as a whole. I guess the good news in that the team's driver is now a Marlins fan.
I don't know anything about marketing, never have, and probably never will, but the idea of sponsoring a race car is completely lost on me.