The Rolex Sports Car Series was the premier series run by the Grand American Road Racing Association. It was a North American-based sports car series founded in 2000 under the name Grand American Road Racing Championship to replace the failed United States Road Racing Championship. Rolex took over as series sponsor in 2002.

Grand-Am Road Racing or Grand-Am was an auto racing sanctioning body that was established in 1999 to organize road racing competitions in North America. Its primary focus was the Rolex Sports Car Series, an endurance racing championship series. It sanctioned five auto racing series. The series announced in September 2012 that it would be merging with the American Le Mans Series, which had been Grand-Am's main US competitor since its inception. The two series fully merged in 2014 under the banner of the TUDOR United SportsCar Championship, with the International Motor Sports Association.