Joel Weinberger

Mazda racers win two classes at longest U.S. endurance race at Thunderhill

Mazda6 SKYACTIV-D Clean Diesel cars to tackle Thunderhill 25-hour

Weekend Round Up – Audi Motorsport Blog (27-28/07/2013)

First Runoffs race grids set at Road America

RACE: National Runoffs: Day 4 provisional polesitters

Cullen crowned Runoffs' STU National Champion

RACE: National Runoffs: STU provisional race results

RACE: National Runoffs: Day 3 provisional polesitters

RACE: National Runoffs: Day two qualifying report