2013 -2014 Skip Barber Winter Series presented by Mazda Finale: Wilby and Soori Clinch Championship Braselton, GA. (April 8). It was an exciting weekend in Sebring, Florida for the last round of the 2013-2014 Skip Barber Winter Series presented by Mazda. Racers in the Skip Barber Formula an dMAZDASPEED Challenge took to Sebring International Raceway to crown a champion for the season.