Papis made his Cup Series debut at Infineon Raceway in 2008, piloting the No. 66 Haas CNC Racing Chevrolet in place of regular driver Scott Riggs. He was also scheduled to drive the No. 64 car for Rusty Wallace, Inc. on three road course races in the 2008 Nationwide Series. Haas CNC Racing hired Papis to drive the No. 70 Chevrolet Monte Carlo at the course at Watkins Glen in the Sprint Cup Series in August 2008. He was announced as the driver of the No. 13 GEICO Toyota in 18 races in the 2009 and a full-time ride in the 2010 Sprint Cup.