FORT WORTH, Texas -- Graham Rahal will keep driving for his father's IndyCar Series team.
Rahal, who was in the last year of his contract with Rahal Letterman Lanigan Racing, said Friday that he has signed a five-year contract extension through 2023.
Rahal is the son of Bobby Rahal, the three-time open wheel champion and 1986 Indianapolis 500 winner. The younger Rahal said contract negotiations were handled by the 29-year-old driver's management and Mike Lanigan, one of the other team co-owners along with former television talk show host David Letterman.
Graham Rahal has six IndyCar Series wins, five of them coming since joining the team in 2013.