T.G. Castlenut is a character in Cars 3.
T.G. Castlenut is a veteran racer who races for the team "Re-Volting", replacing Davey Apex sometime between the first and third films. Unlike Apex, who had the number 84, Castlenut is number 48. However, he himself gets fired and replaced by a next-generation rookie named Aaron Clocker before the race at the Motor Speedway of the South.