Shelby Blackstock rounds out Andretti Autosport's Pro Mazda season with another podium finish at Sonoma Raceway.

Blackstock finishes fifth, Grist 15th in penultimate Pro Mazda race

The GoPro Grand Prix at Sonoma Raceway is this weekend, and World Speed Motorsports is supporting five racers at their home track for the Pro Mazda Championship presented by Cooper Tires season finale.

Heading into the season finale with a doubleheader at Sonoma Raceway this weekend, Juncos Racing is set for a tight battle for the 2014 Pro Mazda Championship Presented by Cooper Tires. Juncos Racing continues to lead the championship while driver Spencer Pigot leads the driver’s championship.

Ready to close out her first season in the Pro Mazda Championship Presented by Cooper Tires, Julia Ballario is prepared to finish strong at Sonoma Raceway this weekend. Rounds 13 and 14 will be on a 2.385 mile 12-turn road course located in the hills of Sonoma, California. Ballario’s team Juncos Racing currently leads the 2014 Pro Mazda Championship going into the season finale.