Sunday's NASCAR Sprint Cup Series race at Infineon Raceway could very well make or break the season of two underrated drivers who are teammates by virtually all definitions of the word.Marcos Ambrose, who drives for JTG-Daugherty Racing, essentially a satellite of Michael Waltrip Racing (MWR), and David Reutimann, who won his first Cup race for MWR last month at Lowe's Motor Speedway, are two humble and subdued drivers making a lot of noise on the track this year. But the road course in Sonoma, Calif., could mean totally different things to the duo.
