The competitive racing world knows Joel Miller as the driver of the No. 70 Mazda Prototype in the IMSA WeatherTech SportsCar Championship. But outside the car, the 27-year-old Californian acts as the Cooper Tires USF2000 Powered by Mazda driver coach and mentor, helping to train the series’ young drivers on what it takes to succeed on the Mazda Road to Indy and beyond.