On July 12, 2022, Chip Ganassi Racing sent a press release saying that they had extended the contract of Palou for the 2023 IndyCar season by exercising the option they held on his deal. Included in the press release was a quote attributed to Palou. Hours later, Palou, via a thread on Twitter denounced this press release, claimed that the quote attributed to him was created by the team (a practice common among IndyCar teams, according to RACER.coms Marshall Pruett) and also not approved by him. He also stated that he had given Chip Ganassi Racing prior notice that he intended to leave the team after the 2022 season and join McLaren Racing's roster of drivers. Moments after these tweets, McLaren announced that they had signed Palou to a contract for 2023, though it was not specifically mentioned if Palou would drive for Arrow McLaren SP, McLaren's IndyCar operation. Chip Ganassi Racing responded to this by releasing a statement reiterating their claim to Palou's services. On July 27, 2022, Chip Ganassi Racing confirmed they had filed a civil lawsuit against Palou in Marion County, Indiana. On September 14, 2022, it was announced that an agreement had been reached by all parties that would see Palou continue with Chip Ganassi for the 2023 season, with McLaren signing him to test the MCL35M.