British driver Mike Conway, saying he was "not comfortable" on oval racetracks, dropped out of Saturday night's IndyCar season finale at Auto Club Speedway in Fontana, his team, A.J. Foyt Racing, said Thursday.
Wade Cunningham will replace Conway in the No. 14 car, the team said.
The 29-year-old Conway said in a statement that "I've come to realize I'm not comfortable on the ovals and no longer wish to compete on them."
He did not elaborate, but Conway was involved in a spectacular crash at the end of the 2010 Indianapolis 500 in which his car went airborne and into the catch fence in front of the grandstands.
Conway broke a vertebra and suffered multiple factures to his lower left leg, requiring months of rehabilitation.
The Indy 500 and the Fontana race -- where speeds exceed 215 mph -- are two of the five races on oval tracks on this year's 15-race schedule of the Izod IndyCar Series.