Marcos Ambrose was fastest in Saturday practice at Infineon Raceway in Sonoma, California. Ambrose qualified in the sixth spot for Sunday and was fastest Saturday with a lap at 76.40 at 93.77 mph around the 1.99 mile road course in wine country USA. Jeff Burton was second fastest followed by AJ Allmendinger, Jimmie Johnson and Martin Truex Jr all in the top 5. Sam Hornish Jr crashed in practice and will be starting in the rear along with David Ragan who crashed in Friday qualifying. Final practice is set for 1:30pm ET on Speed.