The eNASCAR iRacing Pro Invitational Series was a series of iRacing sim racing events originally organized for NASCAR drivers to compete in after its 2020 seasons were put on hold due to the COVID-19 pandemic.

On January 26, 2021, NASCAR and iRacing announced the Pro Invitational Series would return in 2021 to compensate for a reduced schedule for NASCAR's three national series, as the majority of race weekends only featured races without any practice or qualifying.

Although Fox and NBC were supposed to split broadcast rights for the 2021 slate, the season was canceled following the former's share.

Three of the five Fox events featured new circuits or with considerable changes—Bristol (dirt), Darlington Raceway (switched to the high horsepower, low downforce package instead of the reduced horsepower, high downforce package), and Circuit of the Americas—along with the popular Talladega round and a fictitious street course in the streets of Chicago.

Fox's booth announcers Mike Joy and Jeff Gordon broadcast from Fox's NASCAR studio in Charlotte, North Carolina, which would also serve as the broadcast headquarters for main booth commentators (who did not travel to the racetracks) when real-life competition resumed.