PracticeMode

by JORGE A. MONDACA

Want to find out who is the best pure driver in NASCAR Sprint Cup Series competition? Follow along with all the action this weekend.

For the first time this year, NASCAR's top stars will be forced to make left- and right-hand turns as they do battle at the 1.99-mile Infineon Raceway in Sonoma, Calif. Who will win? Road course races usually come down to strategy and pure skill, so every facet of a team will come into play this weekend.

"These races aren't just an anomaly," said Bobby Labonte. "They are important to the season. A good season can take a turn if you don't run well on the two road courses, so teams take them very seriously."

Who has momentum going into the weekend? Here's a look at the top performers so far this year.

Power Rankings: Busch holding on