Fieldstone Takes NASCAR Sponsorship for a Test Drive A Maryland-based lender is banking that a new race sponsorship will help kick its subprime business into high gear. “We went into this with the thought of Fieldstone being recognized nationally,” said Julie Weldon, marketing associate for Fieldstone Mortgage. Last week, the company announced that it had struck a deal to become an associate sponsor for the Daytona 500 in Florida, run February 18.